Second Amendment and Waiver, dated December 19, 2016, to Credit Agreement, dated as of June 28, 2016, by and among Power Solutions International, Inc., Professional Power Products, Inc., Powertrain Integration Acquisition, LLC and Bi-Phase Technologies, LLC, and TPG Specialty Lending, Inc. and the lenders party thereto

"Amendment") is entered into as of December 19, 2016, by and among the lenders identified on the signature pages hereof (such lenders, together with their respective successors and permitted assigns, are referred to hereinafter each individually as a "Lender" and collectively as "Lenders"), TPG SPECIALTY LENDING, INC., a Delaware corporation ("TSL"), as administrative agent for each member of the Lender Group (in such capacity, together with its successors and assigns in such capacity, "Agent"), TSL, as sole lead arranger (in such capacity, together with its successors and assigns in such capacity, the "Sole Lead Arranger"), POWER SOLUTIONS INTERNATIONAL, INC., a Delaware corporation ("Parent"), PROFESSIONAL POWER PRODUCTS, INC., an Illinois corporation ("PPPI"), POWERTRAIN INTEGRATION ACQUISITION, LLC, an Illinois limited liability company ("PIA"), BI-PHASE TECHNOLOGIES, LLC, a Minnesota limited liability company ("BPT"), and the other Persons from time to time party hereto as borrowers (such Persons together with Parent, PPPI, PIA and BPT, are referred to hereinafter each individually as a "Borrower", and individually and collectively, jointly and severally, as the "Borrowers").

WHEREAS, the Borrowers, Agent, and Lenders are parties to that certain Credit Agreement dated as of June 28, 2016 (as amended, restated, supplemented or otherwise modified from time to time, the "Credit Agreement");

WHEREAS, there exists an Event of Default under Section 7(c) of the Credit Agreement due to the Borrowers' failure to meet the minimum EBITDA required for the month ending October 31, 2016 (the "Minimum EBITDA EOD"); and

WHEREAS, Borrowers, Agent and Lenders have agreed to modify the Credit Agreement and waive the Minimum EBITDA EOD as provided herein, in each case subject to the terms and provisions hereof;

NOW THEREFORE, in consideration of the premises and mutual agreements herein contained, the parties hereto agree as follows:

1.Defined Terms. Unless otherwise defined herein, capitalized terms used herein shall have the meanings ascribed to such terms in the Credit Agreement.

2.Amendments to Credit Agreement. Subject to the satisfaction of the conditions set forth in Section 5 below and in reliance upon the representations and warranties of the Borrowers set forth in Section 6 below, the Credit Agreement is amended as follows:

(a)    Schedule 1.1 to the Credit Agreement is hereby amended by adding the following definitions thereto in their proper alphabetical order:

"Second Amendment" means the Second Amendment and Waiver to Credit Agreement, dated as of the Second Amendment Effective Date, among Borrowers, Agent and Lenders.

"Availability Reserve" means (i) $7,500,000 at all times from the Closing Date up to the Second Amendment Effective Date and (ii) $7,700,000 on the Second Amendment Effective Date and at all times thereafter.

"Closing Date Fee Letter" means that certain amended and restated fee letter, dated as of the Second Amendment Effective Date, among Borrowers and Agent, in form and substance reasonably satisfactory to Agent.

5.16. Engagement of Financial Consultant. The Loan Parties shall at all times from and after the Second Amendment Effective Date maintain their engagement of CR3 Partners as a financial consultant (the "Consultant") upon terms of employment acceptable to the Required Lenders and the Loan Parties. The Consultant shall be engaged solely by the Loan Parties and all fees and expenses of the Consultant shall be solely the responsibility of the Loan Parties. In no event shall Agent or any Lender have any liability or responsibility for the payment of such fees or expenses, and neither Agent nor any Lender shall have any obligation or liability to the Loan Parties, the Consultant or any other Person by reason of any acts or omissions of the Consultant.

(c) Minimum EBITDA. Have EBITDA for each period of 12 consecutive fiscal months of Parent and its Subsidiaries for which the last fiscal month ends on a date set forth below of at least the amount set forth opposite such date:

3.Waiver. Subject to the satisfaction of the conditions set forth in Section 5 below and in reliance upon the representations and warranties set forth in Section 6 below, Agent and Lenders hereby waive the Minimum EBITDA EOD. For the avoidance of doubt, the foregoing waiver shall not be deemed to be a waiver of any other existing or hereafter arising Defaults or Events of Default or any other deviation from the express terms of the Credit Agreement or any other Loan Document. This is a limited waiver and shall not be deemed to constitute a consent or waiver of any other term, provision or condition of the Credit Agreement or any other Loan Document, as applicable, or to prejudice any right or remedy that Agent or any Lender may now have or may have in the future under or in connection with the Credit Agreement or any other Loan Document.

4.Reaffirmation and Confirmation. Each Borrower hereby ratifies, affirms, acknowledges and agrees that the Credit Agreement and the other Loan Documents represent the valid, enforceable and collectible obligations of such Borrower, and further acknowledges that there are no existing claims, defenses, personal or otherwise, or rights of setoff whatsoever with respect to the Credit Agreement or any other Loan Document. Each Borrower hereby agrees that this Amendment in no way acts as a release or relinquishment of the Liens and rights securing payments of the Obligations. The Liens and rights securing payment of the Obligations are hereby ratified and confirmed by the Borrowers in all respects.

5.Conditions to Effectiveness of Amendment. This Amendment shall become effective as of the date first written above upon the satisfaction of the following conditions precedent:

(a)Each party hereto shall have executed and delivered this Amendment to Agent.

(b)Agent shall have received each of the additional documents, instruments and agreements listed on Annex A attached hereto

(c)Agent shall be satisfied that any "Default" or "Event of Default" under the ABL Credit Agreement has been waived in accordance with the terms of the ABL Credit Agreement.

(g)All proceedings taken in connection with the transactions contemplated by this Amendment and all documents, instruments and other legal matters incident thereto shall be reasonably satisfactory to Agent and its legal counsel.

6.Representations and Warranties. In order to induce Agent and Lenders to enter into this Amendment, each Borrower hereby represents and warrants to Agent and Lenders, after giving effect to this Amendment:

(a)    All representations and warranties contained in the Credit Agreement and the other Loan Documents are true and correct in all material respects (except that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof) on and as of the date hereof (except to the extent that such representations and warranties relate solely to an earlier date, in which case such representations and warranties shall be true and correct in all material respects (except that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof) as of such earlier date).

(c)    This Amendment and the Credit Agreement, as amended hereby, constitute legal, valid and binding obligations of each Borrower and are enforceable against such Borrower in accordance with their respective terms, except as enforcement may be limited by equitable principles or by bankruptcy, insolvency, reorganization, moratorium, or similar laws relating to or limiting creditors' rights generally.

(a)    This Amendment shall be a contract made under and governed by, and construed in accordance with the internal laws of the State of New York.

(b)    This Amendment may be executed in any number of counterparts, and by the parties hereto on the same or separate counterparts, and each such counterpart, when executed and delivered, shall be deemed to be an original, but all such counterparts shall together constitute but one and the same Amendment. Delivery of an executed signature page of this Amendment by facsimile transmission or electronic photocopy (i.e. "pdf") shall be effective as delivery of a manually executed counterpart hereof.

8.Release. In consideration of the agreements of Agent and Lenders contained herein and for other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, each Borrower, on behalf of itself, each of its Subsidiaries and each of their respective successors, assigns, and other legal representatives, hereby absolutely, unconditionally and irrevocably releases, remises and forever discharges Agent and Lenders, and their successors and assigns, and their present and former shareholders, affiliates, subsidiaries, divisions, predecessors, directors, officers, attorneys, employees, agents and other representatives (Agent, each Lender and all such other Persons being hereinafter referred to collectively as the "Releasees" and individually as a "Releasee"), of and from all demands, actions, causes of action, suits, covenants, contracts, controversies, agreements, promises, sums of money, accounts, bills, reckonings,

damages and any and all other claims, counterclaims, defenses, rights of set-off, demands and liabilities whatsoever (individually, a "Claim" and collectively, "Claims") of every name and nature, known as of the date of this Amendment, both at law and in equity, which any Borrower, any of its Subsidiaries or any of their respective successors, assigns, or other legal representatives may now or hereafter own, hold, have or claim to have against the Releasees or any of them for, upon, or by reason of any circumstance, action, cause or thing whatsoever which arises at any time on or prior to the day and date of this Amendment, in each case for or on account of, or in relation to, or in any way in connection with any of the Credit Agreement, or any of the other Loan Documents or transactions thereunder or related thereto.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed by their respective officers thereunto duly authorized and delivered as of the date first above written.

Each of the undersigned hereby (i) acknowledges receipt of a copy of the foregoing Second Amendment and Waiver to Credit Agreement (the "Amendment"); (ii) consents to each Borrower's execution and delivery of the Amendment; (iii) agrees to be bound by the Amendment and the release contained in Section 8 thereof; and (iv) affirms that nothing contained therein shall modify in any respect whatsoever any Loan Documents (other than as specifically provided in the Amendment) to which the undersigned is a party and reaffirms that the Loan Documents to which it is a party shall continue to remain in full force and effect. Although each of the undersigned has been informed of the matters set forth herein and has acknowledged and agreed to same, the undersigned understands that Agent and Lenders have no obligation to inform the undersigned of such matters in the future or to seek the undersigned's acknowledgment or agreement to future amendments, waivers or consents, and nothing herein shall create such a duty.

IN WITNESS WHEREOF, the undersigned has executed this Consent and Reaffirmation on and as of the date of the Amendment.