EX-1.1: FORM OF UNDERWRITING AGREEMENT

EXHIBIT 1.1

[•] Shares

SPIRIT AEROSYSTEMS HOLDINGS, INC.

Class A Common Stock

UNDERWRITING AGREEMENT

May [•], 2007

CREDIT SUISSE SECURITIES (USA) LLC,

Eleven Madison Avenue,

New York, N.Y. 10010-3629

GOLDMAN, SACHS & CO.,

85 Broad Street,

New York, N.Y. 10004

MORGAN STANLEY & CO. INCORPORATED,

1585 Broadway,

New York, N.Y. 10036,

[As Representatives of the Several Underwriters],

Dear Sirs:

     1. Introductory. The Stockholders of Spirit AeroSystems Holdings, Inc., a Delaware corporation (the “Company”) listed in Schedule A hereto (the “Selling Stockholders”) propose severally to sell an aggregate of [•] outstanding shares of the Securities (such shares of Securities being hereinafter referred to as the “Firm Securities”). The Selling Stockholders also propose to issue and sell to the Underwriters, at the option of the Underwriters, an aggregate of not more than [•] additional shares (the “Optional Securities”) of their Securities as set forth below. The Firm Securities and the Optional Securities are herein collectively called the “Offered Securities”. The Company and the Selling Stockholders hereby agree with the several Underwriters named in Schedule B hereto (the “Underwriters”) as follows:

     2. Representations and Warranties of the Company and the Selling Stockholders. (a) The Company represents and warrants to, and agrees with, the several Underwriters that:

     (i) A registration statement (No. 333-•) (the “initial registration statement”) relating to the Offered Securities, including a form of prospectus, has been filed with the Securities and Exchange Commission (the “Commission”) and an additional registration statement (the “additional registration statement”) relating to the Offered Securities may have been or may be filed with the Commission pursuant to Rule 462(b) (“Rule 462(b)”) under the Securities Act of 1933 (the “Act”). “Initial Registration Statement” as of any time means the initial registration statement, in the form then filed with the Commission, including all material then incorporated by reference therein, all information contained in the additional registration statement (if any) and then deemed to be a part of the initial registration statement pursuant to the General Instructions of the Form on which it is filed and all information (if any) included in a prospectus then deemed to be a part of the initial registration statement pursuant to Rule 430C (“Rule 430C”) under the Act or retroactively deemed to be a part of the initial registration statement pursuant to Rule 430A(b) (“Rule 430A(b)”) under the Act and that in any case has not then been superseded or modified. “Additional Registration Statement” as of any time means the additional registration statement, in the form then filed with the Commission, including the contents of the Initial Registration Statement incorporated by reference therein and including all information (if any) included in a prospectus then deemed to be a part of the additional registration statement pursuant to Rule 430C or retroactively deemed to be a part of the additional registration statement pursuant to Rule 430A(b) and that in any case has not then been superseded or modified. The Initial Registration Statement and the Additional Registration Statement are herein referred to collectively as the “Registration Statements” and individually as a “Registration Statement”. “Registration Statement” as of any time means the Initial Registration Statement and any Additional Registration Statement as of such time. For purposes of the foregoing definitions, information contained in a form of prospectus that is deemed retroactively to be a part of a Registration Statement pursuant to Rule 430A shall be considered to be included in such Registration Statement as of the time specified in Rule 430A. As of the time of execution and delivery of this Agreement, the Initial Registration Statement has been declared effective under the Act and is not proposed to be amended. Any Additional Registration Statement has or will become effective upon filing with the Commission pursuant to Rule 462(b) and is not proposed to be amended.

The Offered Securities all have been or will be duly registered under the Act pursuant to the Initial Registration Statement and, if applicable, the Additional Registration Statement. For purposes of this Agreement, “Effective Time” with respect to the Initial Registration Statement or, if filed prior to the execution and delivery of this Agreement, the Additional Registration Statement means the date and time as of which such Registration Statement was declared effective by the Commission or has become effective upon filing pursuant to Rule 462(c) (“Rule 462(c)”) under the Act. If an Additional Registration Statement has not been filed prior to the execution and delivery of this Agreement but the Company has advised the Representatives that it proposes to file one, “Effective Time” with respect to such Additional Registration Statement means the date and time as of which such Registration Statement is filed and becomes effective pursuant to Rule 462(b). “Effective Date” with respect to the Initial Registration Statement or the Additional Registration Statement (if any) means the date of the Effective Time thereof. A “Registration Statement” without reference to a time means such Registration Statement as of its Effective Time. “Statutory Prospectus” as of any time means the prospectus included in a Registration Statement immediately prior to that time, including any document incorporated by reference therein and any information in a prospectus deemed to be a part thereof pursuant to Rule 430A or 430C that has not been superseded or modified. For purposes of the preceding sentence, information contained in a form of prospectus that is deemed retroactively to be a part of a Registration Statement pursuant to Rule 430A shall be considered to be included in the Statutory Prospectus as of the actual time that form of prospectus is filed with the Commission pursuant to Rule 424(b) (“Rule 424(b)”) under the Act. “Prospectus” means the Statutory Prospectus that discloses the public offering price and other final terms of the Offered Securities and otherwise satisfies Section 10(a) of the Act. “Issuer Free Writing Prospectus” means any “issuer free writing prospectus,” as defined in Rule 433 under the Act, relating to the Offered Securities in the form filed or required to be filed with the Commission or, if not required to be filed, in the form retained in the Company’s records pursuant to Rule 433(g) under the Act. “General Use Issuer Free Writing Prospectus” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors, as evidenced by its being specified in a schedule to this Agreement. “Limited Use Issuer Free Writing Prospectus” means any Issuer Free Writing Prospectus that is not a General Use Issuer Free Writing Prospectus. “Applicable Time” means [ ] p.m. (Eastern time) on the date of this Agreement.

     (ii) (A) On the Effective Date of the Initial Registration Statement, the Initial Registration Statement conformed in all material respects to the requirements of the Act and the rules and regulations of the Commission (the “Rules and Regulations”) and did not include any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading, (B) on the Effective Date of the Additional Registration Statement (if any), each Registration Statement conformed, or will conform, in all material respects to the requirements of the Act and the Rules and Regulations and did not include, or will not include, any untrue statement of a material fact and did not omit, or will not omit, to state any material fact required to be stated therein or necessary to make the statements therein not misleading and (C) on the date of this Agreement, the Initial Registration Statement and, if the Effective Time of the Additional Registration Statement is prior to the execution and delivery of this Agreement, the Additional Registration Statement each conforms, and at the time of filing of the Prospectus pursuant to Rule 424(b) or (if no such filing is required) at the Effective Date of the Additional Registration Statement in which the Prospectus is included, each Registration Statement and the Prospectus will conform, in all material respects to the requirements of the Act and the Rules and Regulations, and neither of such documents includes, or will include, any untrue statement of a material fact or omits, or will omit, to state any material fact required to be stated therein or necessary to make the statements therein (with respect to the Prospectus, in the light of the circumstances under which they are made) not misleading. The preceding sentence does not apply to statements in or omissions from a Registration Statement or the Prospectus based upon written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information is that described as such in Section 8(c) hereof.

     (iii) (A) At the time of initial filing of the Initial Registration Statement and (B) at the date of this Agreement, the Company was not and is not an “ineligible issuer,” as defined in Rule 405, including (1) the Company or any other subsidiary in the preceding three years not having been convicted of a felony or misdemeanor or having been made the subject of a judicial or administrative decree or order as described in Rule 405 and (2) the Company in the preceding three years not having been the subject of a bankruptcy petition or insolvency or similar proceeding, not having had a registration statement be the subject of a proceeding under Section 8 of the Act and not being the

subject of a proceeding under Section 8A of the Act in connection with the offering of the Offered Securities, all as described in Rule 405.

     (iv) As of the Applicable Time, neither (A) the General Use Issuer Free Writing Prospectus(es) issued at or prior to the Applicable Time, the preliminary prospectus, dated May [ ], 2007 (which is the most recent Statutory Prospectus distributed to investors generally) and the document attached as Annex A to this Agreement, all considered together (collectively, the “General Disclosure Package”), nor (B) any individual Limited Use Issuer Free Writing Prospectus, when considered together with the General Disclosure Package, included any untrue statement of a material fact or omitted to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. The preceding sentence does not apply to statements in or omissions from any prospectus included in the Registration Statement or any Issuer Free Writing Prospectus in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 8(c) hereof.

     (v) Each Issuer Free Writing Prospectus, as of its issue date and at all subsequent times through the completion of the public offer and sale of the Offered Securities or until any earlier date that the Company notified or notifies the Representatives as described in the next sentence, did not, does not and will not include any information that conflicted, conflicts or will conflict with the information then contained in the Registration Statement. If at any time following issuance of an Issuer Free Writing Prospectus but no later than the latest of (i) the Closing Date, (ii) the completion of the distribution of the Offered Securities or (iii) the termination of the Representatives’ prospectus delivery obligation pursuant to Section 4(3) of the Act, there occurred or occurs an event or development as a result of which such Issuer Free Writing Prospectus conflicted or would conflict with the information then contained in the Registration Statement or included or would include an untrue statement of a material fact or omitted or would omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances prevailing at that subsequent time, not misleading, (i) the Company has promptly notified or will promptly notify the Representatives and (ii) the Company has promptly amended or supplemented or will promptly amend or supplement such Issuer Free Writing Prospectus to eliminate or correct such conflict, untrue statement or

omission. The foregoing two sentences do not apply to statements in or omissions from any Issuer Free Writing Prospectus in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 8(c) hereof.

     (vi) The Company has been duly incorporated and is an existing corporation in good standing under the laws of the State of Delaware, with corporate power and authority to own its properties and conduct its business as described in the General Disclosure Package; and the Company is duly qualified to do business as a foreign corporation in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except for any jurisdiction where the failure to be so qualified would not, individually or in the aggregate, have a material adverse effect on the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as a whole (“Material Adverse Effect”).

     (vii) Each subsidiary of the Company has been duly incorporated and is an existing corporation in good standing under the laws of the jurisdiction of its incorporation, with corporate or other entity power and authority to own its properties and conduct its business as described in the General Disclosure Package; and each subsidiary of the Company is duly qualified to do business as a foreign corporation in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except for any such jurisdiction where the failure to be so qualified would not have a Material Adverse Effect; all of the issued and outstanding capital stock of each subsidiary of the Company has been duly authorized and validly issued and is fully paid and nonassessable; and the capital stock of each subsidiary owned by the Company, directly or through subsidiaries, is owned free from liens, encumbrances and defects (other than transfer restrictions imposed under applicable securities laws).

     (viii) The Offered Securities and all other outstanding shares of capital stock of the Company have been duly authorized; all outstanding shares of capital stock of the Company are, and, when the Offered Securities have been delivered and paid for in accordance with this Agreement on each Closing Date (as defined below), such Offered

Securities will have been, validly issued, fully paid and nonassessable, will be consistent in all material respects with the information in the General Disclosure Package and will conform in all material respects to the description thereof contained in the Prospectus; and the stockholders of the Company have no preemptive rights with respect to the Securities.

     (ix) Except as disclosed in the General Disclosure Package, there are no contracts, agreements or understandings between the Company and any person that would give rise to a valid claim against the Company or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering.

     (x) Except as disclosed in the General Disclosure Package, there are no contracts, agreements or understandings between the Company and any person granting such person the right to require the Company to file a registration statement under the Act with respect to any securities of the Company owned or to be owned by such person or to require the Company to include such securities in the securities registered pursuant to a Registration Statement or in any securities being registered pursuant to any other registration statement filed by the Company under the Act that have not been complied with or waived in writing.

     (xi) The Offered Securities have been approved for listing on The New York Stock Exchange.

     (xii) No consent, approval, authorization, or order of, or filing with, any governmental agency or body or any court is required to be obtained or made by the Company for the consummation of the transactions contemplated by this Agreement in connection with the issuance and sale of the Offered Securities, except such as have been obtained and made under the Act and the Securities Exchange Act of 1934 (the “Exchange Act”) and such as may be required under state securities laws.

     (xiii) The execution, delivery and performance of this Agreement, and the issuance and sale of the Offered Securities as herein contemplated will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, (a) any statute, any rule, regulation or order of any governmental agency or body or any court, domestic or foreign, having jurisdiction over the Company or any subsidiary of the Company, (b) any of their properties, or any agreement or instrument to which the Company or any such subsidiary is a party or by which the Company or any such

subsidiary is bound or to which any of the properties of the Company or any such subsidiary is subject, or (c) the charter or by-laws of the Company or any such subsidiary, except, in the case of clauses (a) and (b) above, as would not have a Material Adverse Effect, and the Company has full power and authority to authorize, issue and sell the Offered Securities as contemplated by this Agreement.

     (xiv) This Agreement has been duly authorized, executed and delivered by the Company.

     (xv) Except as disclosed in the General Disclosure Package, the Company and its subsidiaries have good and marketable title to all real properties and all other properties and assets owned by them, in each case free from liens, encumbrances and defects that would affect the value thereof or interfere with the use made or to be made thereof by them, except in each case as would not, individually or in the aggregate, have a Material Adverse Effect; and except as disclosed in the General Disclosure Package, the Company and its subsidiaries hold any leased real or personal property under valid and enforceable leases with no exceptions that would materially interfere with the use made or to be made thereof by them, except in each case as would not, individually or in the aggregate, have a Material Adverse Effect.

     (xvi) The Company and its subsidiaries possess adequate certificates, authorities or permits issued by appropriate governmental agencies or bodies necessary to conduct the business now operated by them and have not received any notice of proceedings relating to the revocation or modification of any such certificate, authority or permit that, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate have a Material Adverse Effect.

     (xvii) No labor dispute with the employees of the Company or any subsidiary exists or, to the knowledge of the Company, is imminent that would have a Material Adverse Effect.

     (xviii) The Company and its subsidiaries own, possess or can acquire on reasonable terms, adequate trademarks, trade names and other rights to inventions, know-how, patents, copyrights, confidential information and other intellectual property or licenses to use the same (collectively, “intellectual property rights”) necessary to conduct the business now operated by them, or presently employed by them, and have not received any notice of infringement of or conflict with asserted rights of others with

respect to any intellectual property rights that, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate have a Material Adverse Effect.

     (xix) Except as disclosed in the General Disclosure Package, neither the Company nor any of its subsidiaries is in violation of any statute, any rule, regulation, decision or order of any governmental agency or body or any court, domestic or foreign, relating to the use, disposal or release of hazardous or toxic substances or relating to the protection or restoration of the environment or human exposure to hazardous or toxic substances (collectively, “environmental laws”), owns or operates any real property contaminated with any substance that is subject to any environmental laws, is liable for any off-site disposal or contamination pursuant to any environmental laws, or is subject to any claim relating to any environmental laws, which violation, contamination, liability or claim would individually or in the aggregate have a Material Adverse Effect; and the Company is not aware of any pending investigation which might lead to such a claim.

     (xx) Except as disclosed in the General Disclosure Package, there are no pending actions, suits or proceedings against or affecting the Company, any of its subsidiaries or any of their respective properties that, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate have a Material Adverse Effect, or would materially and adversely affect the ability of the Company to perform its obligations under this Agreement, or which are otherwise material in the context of the sale of the Offered Securities; and, to the Company’s knowledge, no such actions, suits or proceedings are threatened or contemplated.

     (xxi) The financial statements of the Company and its consolidated subsidiaries, together with the related notes, included in each Registration Statement and the General Disclosure Package present fairly, in all material respects, the financial position of the Company and its consolidated subsidiaries as of the dates shown and their results of operations and cash flows for the periods shown, and such financial statements have been prepared in conformity with the generally accepted accounting principles in the United States applied on a consistent basis and the schedule included in each Registration Statement presents fairly, in all material respects, the information required to be stated therein.

     (xxii) The financial statements of the Wichita division (the “Division”) of the

Boeing Commercial Airplanes Operating Segment of The Boeing Company, together with the related notes, included in each Registration Statement and the General Disclosure Package present fairly, in all material respects, the assets and liabilities of the Division as of the dates shown and its cost center activity for the periods shown, and such financial statements have been prepared in conformity with the generally accepted accounting principles in the United States applied on a consistent basis.

     (xxiii) Except as disclosed in the General Disclosure Package, since the date of the latest audited financial statements included in the General Disclosure Package there has been no material adverse change, nor any development or event involving a prospective material adverse change, in the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as a whole, and, except as disclosed in or contemplated by the General Disclosure Package, there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its capital stock.

     (xxiv) The Company and each of its subsidiaries makes and keeps accurate books and records and maintains a system of internal accounting controls sufficient to provide reasonable assurance that (a) transactions are executed in accordance with management’s general or specific authorization; (b) transactions are recorded as necessary to permit preparation of financial statements in conformity with the generally accepted accounting principles in the United States and to maintain accountability for assets; (c) access to assets is permitted only in accordance with management’s general or specific authorization; and (d) the recorded accountability for assets is compared with existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

     (xxv) The Company is not an “investment company” as defined in the Investment Company Act of 1940.

     (b) Each Selling Stockholder severally represents and warrants to, and agrees with, the several Underwriters that:

     (i) Such Selling Stockholder, if it is not a natural person, is validly existing and, to the extent such concept exists in the relevant jurisdiction, in good standing under the laws of the jurisdiction of its organization.

     (ii) Such Selling Stockholder has, and on any Closing Date will have, full legal right, power and authority, and all authorization and approval required by law, to enter into (a) this Agreement and (b) the Custody Agreement (the “Custody Agreement”) signed by such Selling Stockholder and the Company, as Custodian (the “Custodian”), relating to the deposit of the Offered Securities to be sold by such Selling Stockholder and the Power of Attorney (the “Power of Attorney”) appointing certain individuals as such Selling Stockholders’ attorneys-in-fact (the “Attorneys-in-Fact”) to the extent set forth therein and relating to the transactions contemplated hereby; provided that clause (b) shall not apply to any Selling Stockholder that is a partnership, company or other entity directly or indirectly controlled or owned by Onex Corporation (each such entity, an “Onex Entity” and each such Selling Stockholder an “Onex Selling Stockholder”); and to sell, assign, transfer and deliver the Offered Securities to be sold by such Selling Stockholder in the manner provided herein and therein.

     (iii) This Agreement has been duly authorized, executed and delivered by or on behalf of such Selling Stockholder.

     (iv) The Custody Agreement and the Power of Attorney of such Selling Stockholder, other than any Onex Selling Stockholder, have been duly authorized, executed and delivered by such Selling Stockholder and are valid and binding agreements of such Selling Stockholder, enforceable in accordance with their terms.

     (v) The execution and delivery by such Selling Stockholder, and the performance by such Selling Stockholder of its obligations under, this Agreement will not contravene any provision of applicable law or the organizational documents of such Selling Stockholder or any agreement or other instrument binding upon such Selling Stockholder or any of its assets or any judgment, order or decree of any governmental body, agency or court having jurisdiction over such Selling Stockholder or any of its assets, except where such contravention would not individually or in the aggregate materially adversely affect the ability of such Selling Stockholder to consummate the transactions contemplated hereby, and no consent, approval, authorization, or order of, or filing with, any governmental agency or body or any court is required to be obtained or made by such Selling Stockholder for the performance by such Selling Stockholder of its obligations under this Agreement, except (A) such as have been obtained or made, (B) such as may be required under state securities laws or the rules of the National Association of Securities Dealers, Inc. (the “NASD”) and (C) such as may be required by

the securities laws of any jurisdiction outside the United States of America.

     (vi) Such Selling Stockholder has and on each Closing Date hereinafter mentioned will have valid and unencumbered title to the Offered Securities to be delivered by such Selling Stockholder on such Closing Date and full right, power and authority to enter into this Agreement and to sell, assign, transfer and deliver the Offered Securities to be delivered by such Selling Stockholder on such Closing Date hereunder; and upon the delivery of and payment for the Offered Securities on each Closing Date hereunder the several Underwriters will acquire valid and unencumbered title to the Offered Securities to be delivered by such Selling Stockholder on such Closing Date, free and clear of all liens, encumbrances, equities or adverse claims.

     (vii) (A) On the Effective Date of the Initial Registration Statement, the Initial Registration Statement conformed in all material respects to the requirements of the Act and the Rules and Regulations and did not include any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading, (B) on the Effective Date of the Additional Registration Statement (if any), each Registration Statement conformed, or will conform, in all material respects to the requirements of the Act and the Rules and Regulations and did not include, or will not include, any untrue statement of a material fact and did not omit, or will not omit, to state any material fact required to be stated therein or necessary to make the statements therein not misleading, and (C) on the date of this Agreement, the Initial Registration Statement and, if the Effective Time of the Additional Registration Statement is prior to the execution and delivery of this Agreement, the Additional Registration Statement each conforms, and at the time of filing of the Prospectus pursuant to Rule 424(b) or (if no such filing is required) at the Effective Date of the Additional Registration Statement in which the Prospectus is included, each Registration Statement and the Prospectus will conform, in all material respects to the requirements of the Act and the Rules and Regulations, and neither of such documents includes, or will include, any untrue statement of a material fact or omits, or will omit, to state any material fact required to be stated therein or necessary to make the statements therein (with respect to the Prospectus, in the light of the circumstances under which they are made) not misleading. As of the Applicable Time, neither the General Disclosure Package nor any individual Limited Use Issuer Free Writing Prospectus, when considered together with the General Disclosure Package, included any untrue statement of a material fact or omitted to state any material fact necessary in order to make the statements therein, in the

light of the circumstances under which they were made, not misleading. The two preceding sentences apply only to the extent that any statements in or omissions from a Registration Statement, the Prospectus, the General Disclosure Package or any Limited Use Free Writing Prospectus are based on written information furnished to the Company by such Selling Stockholder specifically for use therein. For all purposes in this Agreement such information is limited to the information set forth under the captions “Summary,” “Principal and Selling Stockholders” (consisting of the name and address, number of shares and related footnotes to the table contained in such section) and “Certain Relationships and Related Party Transactions” insofar as such information relates to such Selling Stockholder and is based on written information furnished to the Company by such Selling Stockholder specifically for use in the Registration Statement, the Prospectus, the General Disclosure or any Limited Use Free Writing Prospectus (such Selling Stockholder’s “Selling Stockholder Information”).

     (viii) All of such Selling Stockholder’s Selling Stockholder Information contained in any Issuer Free Writing Prospectus, as of its issue date and at all subsequent times through the completion of the public offer and sale of the Offered Securities or until any earlier date that the Selling Stockholders notified or notify the Company and the Representatives as described in the next sentence, did not, does not and will not include any information that conflicted, conflicts or will conflict with the information then contained in the Registration Statement. If at any time following issuance of an Issuer Free Writing Prospectus there occurred or occurs an event or development as a result of which such Selling Stockholder Information conflicted or would conflict with the information then contained in the Registration Statement or included or would include an untrue statement of a material fact or omitted or would omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances prevailing at that subsequent time, not misleading, such Selling Stockholder has promptly notified or will promptly notify the Company and the Representatives and will provide the Company with all necessary information so as to correct such untrue statement or omission.

     (ix) If such Selling Stockholder is an officer or director of the Company named under the caption “Management-Executive Officers and Directors” in the Prospectus, such Selling Stockholder is not prompted by any information concerning the Company or its subsidiaries which is not set forth in the Prospectus to sell its Securities pursuant to this Agreement.

     (x) There are no material agreements or arrangements relating to the Company or its subsidiaries to which such Selling Stockholder, or, to such Selling Stockholder’s knowledge, any direct or indirect stockholder that is an affiliate of such Selling Stockholder, is a party, which are required to be described in the Registration Statements or the Prospectus or to be filed as exhibits thereto that are not so described or filed.

     (xi) Except as disclosed in the Prospectus, there are no contracts, agreements or understandings between such Selling Stockholder and any person that would give rise to a valid claim against such Selling Stockholder or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering.

     3. Purchase, Sale and Delivery of Offered Securities. On the basis of the representations, warranties and agreements and subject to the terms and conditions set forth herein, each Selling Stockholder agrees, severally and not jointly, to sell to the several Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase from each Selling Stockholder, at a purchase price of $[•] per share, that number of Firm Securities (rounded up or down, as determined by the Representatives in their discretion, in order to avoid fractions) obtained by multiplying the number of Firm Securities set forth opposite the name of such Selling Stockholder in Schedule A hereto by a fraction the numerator of which is the number of Firm Securities set forth opposite the name of such Underwriter in Schedule B hereto and the denominator of which is the total number of Firm Securities.

     Certificates in negotiable form for the Offered Securities to be sold by the Selling Stockholders hereunder have been placed in custody, for delivery under this Agreement, under the Custody Agreements. Each Selling Stockholder agrees that the shares represented by the certificates held in custody for the Selling Stockholders under such Custody Agreements are subject to the interests of the Underwriters hereunder, that the arrangements made by the Selling Stockholders for such custody are to that extent irrevocable, and that the obligations of the Selling Stockholders hereunder shall not be terminated by operation of law, whether by the death of any individual Selling Stockholder or the occurrence of any other event, or in the case of a trust, by the death of any trustee or trustees or the termination of such trust. If any individual Selling Stockholder or any such trustee or trustees should die, or if any other such event should occur, or if any of such trusts should terminate, before the delivery of the Offered Securities hereunder, certificates for such Offered Securities shall be delivered by the Custodian in accordance with the terms and conditions of this Agreement as if such death or other event or termination had not occurred, regardless of whether or not the Custodian shall have received notice of such death or

other event or termination. This paragraph shall not apply to the Onex Selling Stockholders or to Offered Securities owned by any Onex Selling Stockholders.

     The Onex Selling Stockholders and the Custodian will deliver the Firm Securities to or as instructed by the Representatives for the accounts of the several Underwriters in a form reasonably acceptable to the Representatives against payment of the purchase price by the Underwriters in Federal (same day) funds by official bank check or checks or wire transfer to an account at a bank acceptable to the Representatives drawn to the order of Spirit AeroSystems Holdings, Inc., as Custodian, in the case of [ ] shares of Firm Securities, and [ ], in the case of [ ] shares of Firm Securities, at the office of Cravath, Swaine & Moore LLP, at 9:00 A.M., New York time, on May [ ], 2007, or at such other time not later than seven full business days thereafter as the Representatives and the Company determine, such time being herein referred to as the “First Closing Date”. For purposes of Rule 15c6-1 under the Exchange Act, the First Closing Date (if later than the otherwise applicable settlement date) shall be the settlement date for payment of funds and delivery of securities for all the Offered Securities sold pursuant to the offering. The Firm Securities so to be delivered will be made available for checking at the office of Cravath, Swaine & Moore LLP at least 24 hours prior to the First Closing Date.

     In addition, upon written notice from the Representatives given to the Company and the Selling Stockholders from time to time not more than 30 days subsequent to the date of the Prospectus, the Underwriters may purchase all or less than all of the Optional Securities at the purchase price per Security to be paid for the Firm Securities. The Selling Stockholders agree, severally and not jointly, to sell to the Underwriters the respective numbers of Optional Securities obtained by multiplying the number of Optional Securities specified in such notice by a fraction the numerator of which is the number of shares set forth opposite the names of such Selling Stockholders in Schedule A hereto under the caption “Number of Optional Securities to be Sold” and the denominator of which is the total number of Optional Securities (subject to adjustment by the Representatives to eliminate fractions) and the Underwriters agree, severally and not jointly, to purchase such Optional Securities. Such Optional Securities shall be purchased from each Selling Stockholder for the account of each Underwriter in the same proportion as the number of Firm Securities set forth opposite such Underwriter’s name bears to the total number of Firm Securities (subject to adjustment by the Representatives to eliminate fractions) and may be purchased by the Underwriters only for the purpose of covering over-allotments made in connection with the sale of the Firm Securities. No Optional Securities shall be sold or delivered unless the Firm Securities previously have been, or simultaneously are, sold and delivered. The right to purchase the Optional Securities or any portion thereof may be exercised from time to

time and to the extent not previously exercised may be surrendered and terminated at any time upon notice by the Representatives to the Company and the Selling Stockholders.

     Each time for the delivery of and payment for the Optional Securities, being herein referred to as an “Optional Closing Date”, which may be the First Closing Date (the First Closing Date and each Optional Closing Date, if any, being sometimes referred to as a “Closing Date”), shall be determined by the Representatives but shall be not later than five full business days and not sooner than one full business day after written notice of election to purchase Optional Securities is given. The Onex Selling Stockholders and the Custodian will deliver the Optional Securities being purchased on each Optional Closing Date to or as instructed by the Representatives for the accounts of the several Underwriters in a form reasonably acceptable to the Representatives against payment of the purchase price therefor in Federal (same day) funds by official bank check or checks or wire transfer to an account at a bank acceptable to the Representatives drawn to the order of Spirit AeroSystems Holdings, Inc., as Custodian, in the case of [ ] shares of Optional Securities, and [ ], in the case of [ ] shares of Optional Securities, at the office of Cravath, Swaine & Moore LLP. The Optional Securities being purchased on each Optional Closing Date will be made available for checking at the office of Cravath, Swaine & Moore LLP at a reasonable time in advance of such Optional Closing Date.

     4. Offering by Underwriters. It is understood that the several Underwriters propose to offer the Offered Securities for sale to the public as set forth in the Prospectus.

     5. Certain Agreements of the Company and the Selling Stockholders. The Company agrees with the several Underwriters and the Selling Stockholders that:

     (a) The Company will file the Prospectus with the Commission pursuant to and in accordance with subparagraph (1) (or, if applicable and if consented to by the Representatives, subparagraph (4)) of Rule 424(b) not later than the earlier of (A) the second business day following the execution and delivery of this Agreement or (B) the fifteenth business day after the Effective Date of the Initial Registration Statement. The Company will advise the Representatives promptly of any such filing pursuant to Rule 424(b). If an additional registration statement is necessary to register a portion of the Offered Securities under the Act but the Effective Time thereof has not occurred as of the execution and delivery of this Agreement, the Company will file the additional registration statement or, if filed, will file a post-effective amendment thereto with the Commission pursuant to and in accordance with Rule 462(b) on or prior to 10:00 p.m.,

New York time, on the date of this Agreement or, if earlier, on or prior to the time the Prospectus is printed and distributed to any Underwriter, or will make such filing at such later date as shall have been consented to by the Representatives.

     (b) The Company will advise the Representatives promptly of any proposal to amend or supplement at any time the Initial Registration Statement, any Additional Registration Statement or any Statutory Prospectus and will not effect such amendment or supplementation without the consent of the Representatives; and the Company will also advise the Representatives promptly of the effectiveness of any Additional Registration Statement (if its Effective Time is subsequent to the execution and delivery of this Agreement) and of any amendment or supplementation of a Registration Statement or any Statutory Prospectus and of the institution by the Commission of any stop order proceedings in respect of a Registration Statement and will use its reasonable best efforts to prevent the issuance of any such stop order and to obtain as soon as possible its lifting, if issued.

     (c) If, at any time when a prospectus relating to the Offered Securities is (or but for the exemption in Rule 172 would be required to be) delivered under the Act in connection with sales by any Underwriter or dealer, any event occurs as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, or if it is necessary at any time to amend the Prospectus to comply with the Act, the Company will promptly notify the Representatives of such event and will promptly prepare and file with the Commission, at its own expense, an amendment or supplement which will correct such statement or omission or an amendment which will effect such compliance. Neither the Representatives’ consent to, nor the Underwriters’ delivery of, any such amendment or supplement shall constitute a waiver of any of the conditions set forth in Section 7.

     (d) As soon as practicable, but not later than the Availability Date (as defined below), the Company will make generally available to its securityholders an earnings statement covering a period of at least 12 months beginning after the Effective Date of the Initial Registration Statement (or, if later, the Effective Date of the Additional Registration Statement) which will satisfy the provisions of Section 11(a) of the Act. For the purpose of the preceding sentence, “Availability Date” means the 45th day after the end of the fourth fiscal quarter following the fiscal quarter that includes such Effective

Date, except that, if such fourth fiscal quarter is the last quarter of the Company’s fiscal year, “Availability Date” means the 90th day after the end of such fourth fiscal quarter.

     (e) The Company will furnish to the Representatives copies of each Registration Statement (four of which will be signed and will include all exhibits), each related Statutory Prospectus, and, so long as a prospectus relating to the Offered Securities is required to be delivered under the Act in connection with sales by any Underwriter or dealer, the Prospectus and all amendments and supplements to such documents, in each case in such quantities as the Representatives reasonably request. The Prospectus shall be so furnished on or prior to 3:00 p.m., New York time, on the business day following the execution and delivery of this Agreement. All other documents shall be so furnished as soon as available. The Company will pay the expenses of printing and distributing to the Underwriters all such documents.

     (f) The Company will arrange for the qualification of the Offered Securities for sale under the laws of such jurisdictions as the Representatives may reasonably designate and will continue such qualifications in effect so long as required for the distribution; provided, however, that the Company shall not be required to qualify as a foreign corporation or to consent to the service of process under the laws of any such jurisdiction (except service of process with respect to the offering and sale of the Offered Securities) or to subject itself to taxation in respect of doing business in any jurisdiction in which it is not otherwise so subject.

     (g) The Company and each Selling Stockholder agree with the several Underwriters that the Company and such Selling Stockholder will pay all expenses incident to the performance of the obligations of the Company and such Selling Stockholder, as the case may be, under this Agreement and for any transfer taxes on the sale by such Selling Stockholder of the Offered Securities to the Underwriters; the Company will pay for any travel expenses of the Company’s or any Selling Stockholder’s officers and employees and any other expenses of the Company or any Selling Stockholder in connection with attending or hosting meetings with prospective purchasers of the Offered Securities, including the cost of any aircraft chartered in connection with attending or hosting such meetings, for any filing fees and other expenses (including reasonable fees and disbursements of counsel) incurred in connection with qualification of the Offered Securities for sale under the laws of such jurisdictions as the Representatives reasonably designate and the printing of memoranda relating thereto,

for the filing fee incident to the review by the NASD of the Offered Securities, for expenses incurred in distributing preliminary prospectuses and the Prospectus (including any amendments and supplements thereto) to the Underwriters and for expenses incurred for preparing, printing and distributing any Issuer Free Writing Prospectuses to investors or prospective investors. Nothing in this paragraph 5(g) amends or otherwise alters any existing agreement between the Company and the Selling Stockholders with respect to responsibilities for expenses in connection with the Offered Securities.

     (h) For the period specified below (the “Lock-Up Period”), the Company will not offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, or file with the Commission a registration statement under the Act relating to, any additional shares of its Securities or securities convertible into or exchangeable or exercisable for any shares of its Securities, or publicly disclose the intention to make any such offer, sale, pledge, disposition or filing, without the prior written consent of the Representatives, except issuances of Securities pursuant to the conversion or exchange of convertible or exchangeable securities or the exercise of warrants or options, in each case outstanding on the date hereof or grants of stock pursuant to the terms of a plan on file as an exhibit to the Registration Statement on the date hereof (including, without limitation, exhibits incorporated by reference). The initial Lock-Up Period will commence on the date hereof and will continue and include the date 90 days after the date hereof or such earlier date that the Representatives consent to in writing; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or material news or a material event relating to the Company occurs or (2) prior to the expiration of the initial Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the initial Lock-Up Period, then in each case the Lock-Up Period will be extended until the expiration of the 18-day period beginning on the date of release of the earnings results or the occurrence of the material news or material event, as applicable, unless the Representatives waive, in writing, such extension. The Company will provide the Representatives with notice of any announcement described in clause (2) of the preceding sentence that gives rise to an extension of the Lock-Up Period.

     (i) Each Selling Stockholder agrees during the Lock-Up Period not to offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, any additional shares of the Securities of the Company or securities convertible into or exchangeable or exercisable for any shares of Securities, enter into a transaction which would have the

same effect, or enter into any swap, hedge or other arrangement that transfers, in whole or in part, any of the economic consequences of ownership of the Securities, whether any such aforementioned transaction is to be settled by delivery of the Securities or such other securities, in cash or otherwise, or publicly disclose the intention to make any such offer, sale, pledge or disposition, or enter into any such transaction, swap, hedge or other arrangement, without, in each case, the prior written consent of the Representatives. The initial Lock-Up Period will commence on the date hereof and will continue and include the date 90 days after the date hereof or such earlier date that the Representatives consent to in writing; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or material news or a material event relating to the Company occurs or (2) prior to the expiration of the initial Lock-Up Period, the company announces that it will release earnings results during the 16-day period beginning on the last day of the initial Lock-Up Period, then in each case the Lock-Up Period will be extended until the expiration of the 18-day period beginning on the date of release of the earnings results or the occurrence of the material news or material event, as applicable, unless the Representatives waive, in writing, such extension.

     This paragraph (i) shall not apply to (A) in the case of an Onex Selling Stockholder, Securities acquired in the open market, any Securities sold in the Offering pursuant to this Agreement and transfers or distributions of Securities between or among an Onex Entity and another Onex Entity, provided the transferee agrees to be bound in writing by the terms of this Section 5(i) prior to such transfer and no filing by any party (transferor or transferee) under the Exchange Act shall be required or shall be voluntarily made in connection with such transfer (other than a filing (including amendments) pursuant to Section 13(d) or 13(g) of the Exchange Act or a filing on Form 3, 4 or 5 under the Exchange Act); and (B) in the case of a Selling Stockholder that is not an Onex Selling Stockholder, Securities acquired in the open market, any Securities sold in the Offering pursuant to this Section 5(i), and transfers of Securities to a family member or a trust or any affiliate or to the Company by a Selling Stockholder upon termination of employment with the Company, provided the transferee agrees to be bound in writing by the terms of this Agreement prior to such transfer and no filing by any party (donor, donee, transferor or transferee) under the Exchange Act shall be required or shall be voluntarily made in connection with such transfer (other than a filing (including amendments) pursuant to Section 13(d) or 13(g) of the Exchange Act or a filing on

Form 3, 4 or 5 under the Exchange Act).

     6. Free Writing Prospectuses. The Company represents and agrees that, unless it obtains the prior consent of the Representatives, and each Underwriter and Selling Stockholder represents and agrees that, unless it obtains the prior consent of the Company and the Representatives, it has not made and will not make any offer relating to the Offered Securities that would constitute an Issuer Free Writing Prospectus, or that would otherwise constitute a “free writing prospectus,” as defined in Rule 405, required to be filed with the Commission. Any such free writing prospectus consented to by the Company and the Representatives is hereinafter referred to as a “Permitted Free Writing Prospectus.” The Company represents that it has treated and agrees that it will treat each Permitted Free Writing Prospectus as an “issuer free writing prospectus,” as defined in Rule 433, and has complied and will comply with the requirements of Rules 164 and 433 applicable to any Permitted Free Writing Prospectus, including timely Commission filing where required, legending and record keeping. The Company represents that it has satisfied and agrees that it will satisfy the conditions in Rule 433 to avoid a requirement to file with the Commission any electronic road show.

     7. Conditions of the Obligations of the Underwriters. The obligations of the several Underwriters to purchase and pay for the Firm Securities on the First Closing Date and the Optional Securities to be purchased on each Optional Closing Date will be subject to the accuracy of the representations and warranties on the part of the Company and the Selling Stockholders herein, to the accuracy of the statements of Company officers made pursuant to the provisions hereof, to the performance by the Company and the Selling Stockholders of their obligations hereunder and to the following additional conditions precedent:

     (a) The Representatives shall have received a letter, dated the date of delivery thereof (which shall be on or prior to the date of this Agreement), of PricewaterhouseCoopers LLC confirming that they are independent public accountants within the meaning of the Act and the applicable published Rules and Regulations thereunder and stating to the effect that:

     (i) in their opinion the financial statements and schedules examined by them and included in the Registration Statements and the General Disclosure Package comply as to form in all material respects with the applicable accounting requirements of the Act and the related published Rules and Regulations;

     (ii) they have performed the procedures specified by the American

Institute of Certified Public Accountants for a review of interim financial information as described in Statement of Auditing Standards No. 100, Interim Financial Information, on the unaudited financial statements as of and for the three-month period ended March 29, 2007 included in the Registration Statements and the General Disclosure Package;

     (iii) on the basis of the review referred to in clause (ii) above, a reading of the latest available interim financial statements of the Company, inquiries of officials of the Company who have responsibility for financial and accounting matters and other specified procedures, nothing came to their attention that caused them to believe that:

     (A) the unaudited financial statements as of and for the three-month period ended March 29, 2007 included in the Registration Statements or the General Disclosure Package do not comply as to form in all material respects with the applicable accounting requirements of the Act and the related published Rules and Regulations or any material modifications should be made to such unaudited financial statements for them to be in conformity with the generally accepted accounting principles in the United States;

     (B) at the date of the latest available balance sheet read by such accountants, or at a subsequent specified date not more than three business days prior to the date of this Agreement, there was any change in the capital stock or any increase in long-term debt of the Company and its consolidated subsidiaries as compared with amounts shown on the latest balance sheet included in the General Disclosure Package; or

     (C) for the period from the closing date of the latest income statement included in the General Disclosure Package to the closing date of the latest available income statement read by such accountants, or for a subsequent period ending not more than three business days prior to the date of this Agreement, there were any decreases, as compared with corresponding period in the previous year, in consolidated net sales,

except in all cases set forth in clauses (B) and (C) above for changes, increases or decreases which are described in such letter;

     (iv) they have compared specified dollar amounts (or percentages derived from such dollar amounts) and other financial information contained in the Registration Statements, each Issuer Free Writing Prospectus (other than any Issuer Free Writing Prospectus that is an “electronic road show,” as defined in Rule 433(h)) and the General Disclosure Package (in each case to the extent that such dollar amounts, percentages and other financial information are derived from the general accounting records of the Company and its subsidiaries subject to the internal controls of the Company’s accounting system or are derived directly from such records by analysis or computation) with the results obtained from inquiries, a reading of such general accounting records and other procedures specified in such letter and have found such dollar amounts, percentages and other financial information to be in agreement with such results, except as otherwise specified in such letter.

For purposes of this subsection, if the Effective Time of the Additional Registration Statement is subsequent to the execution and delivery of this Agreement, “Registration Statements” shall mean the Initial Registration Statement and the Additional Registration Statement as proposed to be filed shortly prior to its Effective Time, and “Prospectus” shall mean the prospectus included in the Registration Statements.

     (b) The Representatives shall have received a letter, dated the date of delivery thereof (which shall be on or prior to the date of this Agreement), of Deloitte and Touche LLP confirming that they are independent public accountants within the meaning of the Act and the applicable published Rules and Regulations thereunder and stating to the effect that:

     (i) in their opinion the financial statements examined by them and included in the Registration Statements and the General Disclosure Package comply as to form in all material respects with the applicable accounting requirements of the Act and the related published Rules and Regulations; and

     (ii) they have compared specified dollar amounts (or percentages derived from such dollar amounts) and other financial information contained in the Registration Statements, each Issuer Free Writing Prospectus (other than any Issuer Free Writing Prospectus that is an “electronic road show” as defined in Rule 433(h)) and the General Disclosure Package (in each case to the extent that

such dollar amounts, percentages and other financial information are derived from the general accounting records of the Division and its subsidiaries subject to the internal controls of the Division’s accounting system or are derived directly from such records by analysis or computation) with the results obtained from inquiries, a reading of such general accounting records and other procedures specified in such letter and have found such dollar amounts, percentages and other financial information to be in agreement with such results, except as otherwise specified in such letter.

For purposes of this subsection, if the Effective Time of the Additional Registration Statement is subsequent to the execution and delivery of this Agreement, “Registration Statements” shall mean the Initial Registration Statement and the Additional Registration Statement as proposed to be filed shortly prior to its Effective Time, and “Prospectus” shall mean the prospectus included in the Registration Statements.

     (c) If the Effective Time of the Additional Registration Statement (if any) is not prior to the execution and delivery of this Agreement, such Effective Time shall have occurred not later than 10:00 p.m., New York time, on the date of this Agreement or, if earlier, the time the Prospectus is printed and distributed to any Underwriter, or shall have occurred at such later date as shall have been consented to by the Representatives. The Prospectus shall have been filed with the Commission in accordance with the Rules and Regulations and Section 5(a) of this Agreement. Prior to such Closing Date, no stop order suspending the effectiveness of a Registration Statement shall have been issued and no proceedings for that purpose shall have been instituted or, to the knowledge of any Selling Stockholder, the Company or the Representatives, shall be contemplated by the Commission.

     (d) Subsequent to the execution and delivery of this Agreement, there shall not have occurred (i) any change, or any development or event involving a prospective change, in the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as one enterprise which, in the judgment of a majority in interest of the Underwriters including the Representatives, is material and adverse and makes it impractical or inadvisable to proceed with completion of the public offering or the sale of and payment for the Offered Securities; (ii) any downgrading in the rating of any debt securities of the Company by any “nationally recognized statistical rating organization” (as defined for purposes of Rule 436(g) under the Act), or any public

announcement that any such organization has under surveillance or review its rating of any debt securities of the Company (other than an announcement with positive implications of a possible upgrading, and no implication of a possible downgrading, of such rating) or any announcement that the Company has been placed on negative outlook; (iii) any change in U.S. or international financial, political or economic conditions or currency exchange rates or exchange controls as would, in the judgment of a majority in interest of the Underwriters including the Representatives, be likely to prejudice materially the success of the proposed issue, sale or distribution of the Offered Securities, whether in the primary market or in respect of dealings in the secondary market; (iv) any material suspension or material limitation of trading in securities generally on the New York Stock Exchange, or any setting of minimum prices for trading on such exchange; (v) any suspension of trading of any securities of the Company on any exchange or in the over-the-counter market; (vi) any banking moratorium declared by U.S. Federal or New York authorities; (vii) any major disruption of settlements of securities or clearance services in the United States or (viii) any attack on, outbreak or escalation of hostilities or act of terrorism involving the United States, any declaration of war by Congress or any other national or international calamity or emergency if, in the judgment of a majority in interest of the Underwriters including the Representatives, the effect of any such attack, outbreak, escalation, act, declaration, calamity or emergency makes it impractical or inadvisable to proceed with completion of the public offering or the sale of and payment for the Offered Securities.

     (e) The Representatives shall have received an opinion, dated such Closing Date, of (i) Kaye Scholer LLP, counsel for the Company and Selling Stockholders substantially in the form of Exhibit A hereto [and (ii) [insert as applicable for the other Selling Stockholders] substantially in the form of Exhibit B hereto].

     (f) The Representatives shall have received an opinion, dated the Closing Date, of Gloria F. Flentje, General Counsel to the Company substantially in the form of Exhibit C hereto.

     (g) The Representatives shall have received from Cravath, Swaine & Moore LLP, counsel for the Underwriters, such opinion or opinions, dated such Closing Date, with respect to the incorporation of the Company, the validity of the Offered Securities delivered on such Closing Date, the Registration Statements, the Prospectus and other related matters as the Representatives may require, and the Selling Stockholders and the

Company shall have furnished to such counsel such documents as they request for the purpose of enabling them to pass upon such matters.

     (h) The Representatives shall have received a certificate, dated such Closing Date, of the President or any Vice President and a principal financial or accounting officer of the Company in which such officers shall state that: to the best of their knowledge after reasonable investigation, the representations and warranties of the Company in this Agreement are true and correct; the Company has complied in all material respects with all agreements and satisfied all conditions on its part to be performed or satisfied hereunder at or prior to such Closing Date; no stop order suspending the effectiveness of any Registration Statement has been issued and no proceedings for that purpose have been instituted or are contemplated by the Commission; the Additional Registration Statement (if any) satisfying the requirements of subparagraphs (1) and (3) of Rule 462(b) was filed pursuant to Rule 462(b), including payment of the applicable filing fee in accordance with Rule 111(a) or (b) under the Act, prior to the Applicable Time; and, subsequent to the dates of the most recent financial statements in the General Disclosure Package, there has been no material adverse change, nor any development or event involving a prospective material adverse change, in the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as a whole except as set forth in the General Disclosure Package or as described in such certificate.

     (i) The Representatives shall have received a letter, dated such Closing Date, of PricewaterhouseCoopers LLC which meets the requirements of subsection (a) of this Section, except that the specified date referred to in such subsection will be a date not more than three days prior to such Closing Date for the purposes of this subsection.

     (j) The Representatives shall have received a letter, dated such Closing Date, of Deloitte and Touche LLP which meets the requirements of subsection (b) of this Section, except that the specified date referred to in such Subsection will be a date not more than three days prior to such Closing Date for the purposes of this subsection.

     (k) On or prior to the date of this Agreement, the Representatives shall have received lockup letters from each of the executive officers and directors of the Company who are not Selling Stockholders and the persons set forth on Schedule B.

     (l) The Custodian will deliver to the Representatives a letter stating that it will

deliver to each Selling Stockholder, other than the Onex Selling Stockholders, a United States Treasury Department Form 1099 (or other applicable form or statement specified by the United States Treasury Department regulations in lieu thereof) on or before January 31 of the year following the date of this Agreement.

     (m) To avoid a 28% backup withholding tax each Selling Stockholder will deliver to the Representatives a properly completed and executed United States Treasury Department Form W-9 (or other applicable form or statement specified by Treasury Department regulations in lieu thereof).

The Selling Stockholders and the Company will furnish the Representatives with such conformed copies of such opinions, certificates, letters and documents as the Representatives reasonably request. The Representatives may in their sole discretion waive on behalf of the Underwriters compliance with any conditions to the obligations of the Underwriters hereunder, whether in respect of an Optional Closing Date or otherwise.

     8. Indemnification and Contribution. (a) The Company will indemnify and hold harmless each Underwriter, its partners, members, directors, officers, affiliates and each person, if any, who controls such Underwriter within the meaning of Section 15 of the Act or Section 20 of the Exchange Act, against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any part of any Registration Statement at any time, any Statutory Prospectus as of any time, the Prospectus or any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse each Underwriter for any legal or other expenses reasonably incurred by such Underwriter in connection with investigating or defending any such loss, claim, damage, liability or action as such expenses are incurred; provided, however, that the Company will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement in or omission or alleged omission from any of such documents in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in subsection (c) below.

     (b) Each Selling Stockholder severally and not jointly, will indemnify and hold harmless each Underwriter, its partners, members, directors, officers, affiliates and each person, if any, who controls such Underwriter within the meaning of Section 15 of the Act or Section 20 of the Exchange Act, against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any part of any Registration Statement at any time, any Statutory Prospectus as of any time, the Prospectus or any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with such Selling Stockholder’s Selling Stockholder Information, and will reimburse each Underwriter for any legal or other expenses reasonably incurred by such Underwriter in connection with investigating or defending any such loss, claim, damage, liability or action as such expenses are incurred; provided, however, that the Selling Stockholders will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement in or omission or alleged omission from any of such documents in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in subsection (c) below; provided further, however, that the aggregate liability of each such Selling Stockholder pursuant to this subsection (b) and subsection (e) below shall not exceed the amount of proceeds (after deducting underwriting discounts and commissions) each such Selling Stockholder receives from the sale of the Offered Securities.

     (c) Each Underwriter will severally and not jointly indemnify and hold harmless the Company, its directors and officers and each person, if any, who controls the Company within the meaning of Section 15 of the Act or Section 20 of the Exchange Act, and each Selling Stockholder against any losses, claims, damages or liabilities to which the Company or such Selling Stockholder may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any part of any Registration Statement at any time, any Statutory Prospectus as of any time, the Prospectus, or

any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or the alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information furnished to the Company by such Underwriter through the Representatives specifically for use therein, and will reimburse any legal or other expenses reasonably incurred by the Company and each Selling Stockholder in connection with investigating or defending any such loss, claim, damage, liability or action as such expenses are incurred, it being understood and agreed that the only such information furnished by any Underwriter consists of the following information in the Prospectus furnished on behalf of each Underwriter: on the front cover page, each Underwriter’s name, solely with respect to such Underwriter, the concession and reallowance figures appearing in the fifth paragraph under the caption “Underwriting” and the information contained in the twelfth, thirteenth and fourteenth paragraphs under the caption “Underwriting”.

     (d) Promptly after receipt by an indemnified party under this Section of notice of the commencement of any action, such indemnified party will, if a claim in respect thereof is to be made against the indemnifying party under subsection (a), (b) or (c) above, notify the indemnifying party of the commencement thereof; but the failure to notify the indemnifying party shall not relieve it from any liability that it may have under subsection (a), (b) or (c) above except to the extent that it has been materially prejudiced (through the forfeiture of substantive rights or defenses) by such failure; and provided further that the failure to notify the indemnifying party shall not relieve it from any liability that it may have to an indemnified party otherwise than under subsection (a), (b) or (c) above. In case any such action is brought against any indemnified party and it notifies the indemnifying party of the commencement thereof, the indemnifying party will be entitled to participate therein and, to the extent that it may wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel reasonably satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, the indemnifying party will not be liable to such indemnified party under this Section for any legal or other expenses subsequently incurred by such indemnified party in connection with the defense thereof other than reasonable costs of investigation. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement of any pending or threatened action in respect of which any indemnified party is or could have been a party and indemnity could have

been sought hereunder by such indemnified party unless such settlement (i) includes an unconditional release of such indemnified party from all liability on any claims that are the subject matter of such action and (ii) does not include a statement as to, or an admission of, fault, culpability or a failure to act by or on behalf of an indemnified party.

     (e) If the indemnification provided for in this Section is unavailable or insufficient to hold harmless an indemnified party under subsection (a), (b) or (c) above, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of the losses, claims, damages or liabilities referred to in subsection (a), (b) or (c) above (i) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other from the offering of the Securities or (ii) if the allocation provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company and the Selling Stockholders on the one hand and the Underwriters on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Company and the Selling Stockholders bear to the total underwriting discounts and commissions received by the Underwriters. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company, the Selling Stockholders or the Underwriters and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such untrue statement or omission. The amount paid by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the first sentence of this subsection (e) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any action or claim which is the subject of this subsection (e). Notwithstanding the provisions of this subsection (e), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Securities underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of

such fraudulent misrepresentation. The Underwriters’ obligations in this subsection (e) to contribute are several in proportion to their respective underwriting obligations and not joint. The obligations of each Selling Stockholder in this subsection (e) are several and not joint and the aggregate liability of each such Selling Stockholder pursuant to this subsection (e) and subsection (b) above shall not exceed the amount of proceeds (after deducting underwriting discounts and commissions) each such Selling Stockholder shall receive from the sale of the Offered Securities.

     (f) The obligations of the Company and the Selling Stockholders under this Section shall be in addition to any liability which the Company and the Selling Stockholders may otherwise have and shall extend, upon the same terms and conditions, to each person, if any, who controls any Underwriter within the meaning of the Act; and the obligations of the Underwriters under this Section shall be in addition to any liability which the respective Underwriters may otherwise have and shall extend, upon the same terms and conditions, to each director of the Company, to each officer of the Company who has signed a Registration Statement and to each person, if any, who controls the Company within the meaning of the Act.

     9. Default of Underwriters. If any Underwriter or Underwriters default in their obligations to purchase Offered Securities hereunder on either the First or any Optional Closing Date and the aggregate number of shares of Offered Securities that such defaulting Underwriter or Underwriters agreed but failed to purchase does not exceed 10% of the total number of shares of Offered Securities that the Underwriters are obligated to purchase on such Closing Date, the Representatives may make arrangements satisfactory to the Company and the Selling Stockholders for the purchase of such Offered Securities by other persons, including any of the Underwriters, but if no such arrangements are made by such Closing Date, the non-defaulting Underwriters shall be obligated severally, in proportion to their respective commitments hereunder, to purchase the Offered Securities that such defaulting Underwriters agreed but failed to purchase on such Closing Date. If any Underwriter or Underwriters so default and the aggregate number of shares of Offered Securities with respect to which such default or defaults occur exceeds 10% of the total number of shares of Offered Securities that the Underwriters are obligated to purchase on such Closing Date and arrangements satisfactory to the Representatives, the Company and the Selling Stockholders for the purchase of such Offered Securities by other persons are not made within 36 hours after such default, this Agreement will terminate without liability on the part of any non-defaulting Underwriter, the Company or the Selling Stockholders, except as provided in Section 10 (provided that if such default occurs with respect to Optional Securities after the First Closing Date, this Agreement will not terminate as to the Firm Securities or any Optional Securities purchased prior to such termination). As used in this Agreement, the

term “Underwriter” includes any person substituted for an Underwriter under this Section. Nothing herein will relieve a defaulting Underwriter from liability for its default.

     10. Survival of Certain Representations and Obligations. The respective indemnities, agreements, representations, warranties and other statements of the Selling Stockholders, of the Company or its officers and of the several Underwriters set forth in or made pursuant to this Agreement will remain in full force and effect, regardless of any investigation, or statement as to the results thereof, made by or on behalf of any Underwriter, any Selling Stockholder, the Company or any of their respective representatives, officers or directors or any controlling person, and will survive delivery of and payment for the Offered Securities. If this Agreement is terminated pursuant to Section 9 or if for any reason the purchase of the Offered Securities by the Underwriters is not consummated, the Company and the Selling Stockholders shall remain responsible for the expenses to be paid or reimbursed by them pursuant to Section 5 and the respective obligations of the Company, the Selling Stockholders and the Underwriters pursuant to Section 8 shall remain in effect, and if any Offered Securities have been purchased hereunder the representations and warranties in Section 2 and all obligations under Section 5 shall also remain in effect. If the purchase of the Offered Securities by the Underwriters is not consummated for any reason other than solely because of the termination of this Agreement pursuant to Section 9 or the occurrence of any event specified in clause (iii), (iv), (vi), (vii) or (viii) of Section 7(d), the Company will reimburse the Underwriters for all out-of-pocket expenses (including fees and disbursements of counsel) reasonably incurred by them in connection with the offering of the Offered Securities.

     11. Notices. All communications hereunder will be in writing and, if sent to the Underwriters, will be mailed, delivered or facsimiled and confirmed to the Representatives, c/o Credit Suisse Securities (USA) LLC, Eleven Madison Avenue, New York, N.Y. 10010-3629, Attention: LCD-IBD, and c/o Goldman, Sachs & Co., 85 Broad Street, New York, N.Y. 10004, Attention: Registration Department, and c/o Morgan Stanley & Co. Incorporated, 1585 Broadway, New York, N.Y. 10036, Attention: General Counsel, or, if sent to the Company, will be mailed, delivered or facsimiled and confirmed to it at Spirit AeroSystems Holdings, Inc., 3801 South Oliver, Wichita, Kansas 67210 Attention: Ulrich Schmidt, or, if sent to the Selling Stockholders or any of them, will be mailed, delivered or facsimiled and confirmed to each of them at its respective address set forth on Schedule A hereto; provided, however, that any notice to an Underwriter pursuant to Section 8 will be mailed, delivered or facsimiled and confirmed to such Underwriter.

     12. Successors. This Agreement will inure to the benefit of and be binding upon the parties hereto and their respective personal representatives and successors and the officers and directors and controlling persons referred to in Section 8, and no other person will have any right or obligation hereunder.

     13. Representation. The Representatives will act for the several Underwriters in connection with the transactions contemplated by this Agreement, and any action under this Agreement taken by the Representatives jointly will be binding upon all the Underwriters. Ulrich Schmidt will act for the Selling Stockholders (other than the Onex Selling Stockholders) in connection with such transactions, and any action under or in respect of this Agreement taken by Ulrich Schmidt will be binding upon all the Selling Stockholders (other than the Onex Selling Stockholders). Nigel Wright will act for the Onex Selling Stockholders in connection with such transactions, and any action under or in respect of this Agreement taken by Nigel Wright will be binding upon all the Onex Selling Stockholders.

     14. Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the same Agreement.

     15. Absence of Fiduciary Relationship. The Company and the Selling Stockholders acknowledge and agree that:

     (a) The Representatives have been retained solely to act as underwriters in connection with the sale of Offered Securities and that no fiduciary, advisory or agency relationship between the Company or the Selling Stockholders, on the one hand, and the Representatives, on the other, has been created in respect of any of the transactions contemplated by this Agreement or the Prospectus, irrespective of whether the Representatives have advised or are advising the Company or the Selling Stockholders on other matters;

     (b) the price of the Offered Securities set forth in this Agreement was established by the Company, as Custodian, and the Selling Stockholders following discussions and arms-length negotiations with the Representatives and the Company, as Custodian, and the Selling Stockholders are capable of evaluating and understanding and understand and accept the terms, risks and conditions of the transactions contemplated by this Agreement;

     (c) the Company and the Selling Stockholders have been advised that the Representatives and their affiliates are engaged in a broad range of transactions which may involve interests that differ from those of the Company or the Selling Stockholders and that the Representatives have no obligation to disclose such interests and transactions to the Company or the Selling Stockholders by virtue of any fiduciary, advisory or agency relationship; and

     (d) the Company and the Selling Stockholders waive, to the fullest extent permitted by law, any claims they may have against the Representatives for breach of fiduciary duty or alleged breach of fiduciary duty in connection with the transactions contemplated by this Agreement and agree that the Representatives shall have no liability (whether direct or indirect) to the Company or the Selling Stockholders in respect of such a fiduciary duty claim or to any person asserting such a fiduciary duty claim on behalf of or in right of the Company or the Selling Stockholders, including stockholders, employees or creditors of the Company or the Selling Stockholders.

     16. Applicable Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of New York, without regard to principles of conflicts of laws.

     The Company and the Selling Stockholders hereby submit to the non-exclusive jurisdiction of the Federal and state courts in the Borough of Manhattan in The City of New York in any suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

     If the foregoing is in accordance with the Representatives’ understanding of our agreement, kindly sign and return to the Company one of the counterparts hereof, whereupon it will become a binding agreement among the Selling Stockholders, the Company and the several Underwriters in accordance with its terms.

		Very truly yours,
				SPIRIT AEROSYSTEMS HOLDINGS, INC.,
						By:
								Name:
								Title:
				SPIRIT AEROSYSTEMS HOLDINGS, INC., AS CUSTODIAN,
						By:
								Name:
								Title:

     If the foregoing is in accordance with the Representatives’ understanding of our agreement, kindly sign and return to the Company one of the counterparts hereof, whereupon it will become a binding agreement among the Selling Stockholders, the Company and the several Underwriters in accordance with its terms.

		Very truly yours,
				[                    ]
				By:
						Name:
						Title:
				By:
						Name:
						Title:

The foregoing Underwriting Agreement is hereby confirmed and accepted as of the date first above written.
		Acting on behalf of themselves and as the Representatives of the several Underwriters
By:		CREDIT SUISSE SECURITIES (USA) LLC
By:
		Name:
		Title:
By:
		Name:
		Title:

The foregoing Underwriting Agreement is hereby confirmed and accepted as of the date first above written.
		Acting on behalf of themselves and as the Representatives of the several Underwriters
By:		GOLDMAN, SACHS & CO.
By:
		Name:
		Title:

The foregoing Underwriting Agreement is hereby confirmed and accepted as of the date first above written.
		Acting on behalf of themselves and as the Representatives of the several Underwriters
By:		MORGAN STANLEY & CO. INCORPORATED
By:
		Name: Ken Pott
		Title: Managing Director

				Number of Firm		Number of Optional
Selling Stockholder		Address for Notices		Securities to be Sold		Securities to be Sold
Total				[     ]		[     ]

(1) [3801 South Oliver, Witchita, KS 67210]
(2) [712 Fifth Avenue, New York, NY]
(3) [421 Leader St., Marion, OH 43302]

		Number of
Underwriter		Firm Securities
Credit Suisse Securities (USA) LLC			[     ]
Goldman, Sachs & Co.			[     ]
Morgan Stanley & Co. Incorporated			[     ]
Total			[     ]