EX-4.2: FORM OF CLASS B COMMON STOCK CERTIFICATE

Exhibit 4.2

SEE REVERSE SIDE FOR RESTRICTIONS ON TRANSFER AND OTHER INFORMATION

[THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY NOT BE SOLD (WITHIN THE MEANING OF SUCH ACT) IN THE ABSENCE OF REGISTRATION UNDER SUCH ACT OR AN EXEMPTION THEREFROM. THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE ALSO SUBJECT TO CERTAIN RESTRICTIONS ON THE VOTING OF SUCH SECURITIES CONTAINED IN THE INVESTOR STOCKHOLDERS AGREEMENT, DATED AS OF JUNE 16, 2005, AMONG THE ISSUER OF SUCH SECURITIES (THE “COMPANY”) AND CERTAIN OF THE COMPANY’S STOCKHOLDERS. A COPY OF SUCH INVESTOR STOCKHOLDERS AGREEMENT WILL BE FURNISHED WITHOUT CHARGE BY THE COMPANY TO THE HOLDER HEREOF UPON WRITTEN REQUEST.

THE SECURITIES REPRESENTED BY THIS DOCUMENT ARE SUBJECT TO THE TERMS, CONDITIONS, RESTRICTIONS AND CONTINGENCIES, INCLUDING RESTRICTIONS ON TRANSFER AND RISK OF FORFEITURE, CONTAINED IN THE SPIRIT AEROSYSTEMS HOLDINGS, INC. EXECUTIVE INCENTIVE PLAN, AS AMENDED FROM TIME TO TIME, A COPY OF WHICH IS ON FILE AT THE PRINCIPAL OFFICE OF SPIRIT AEROSYSTEMS HOLDINGS, INC.]

[THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY NOT BE SOLD (WITHIN THE MEANING OF SUCH ACT) IN THE ABSENCE OF REGISTRATION UNDER SUCH ACT OR AN EXEMPTION THEREFROM. THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE ALSO SUBJECT TO CERTAIN RESTRICTIONS ON THE VOTING OF SUCH SECURITIES CONTAINED IN THE INVESTOR STOCKHOLDERS AGREEMENT, DATED AS OF JUNE 16, 2005, AMONG THE ISSUER OF SUCH SECURITIES (THE “COMPANY”) AND CERTAIN OF THE COMPANY’S STOCKHOLDERS. A COPY OF SUCH INVESTOR STOCKHOLDERS AGREEMENT WILL BE FURNISHED WITHOUT CHARGE BY THE COMPANY TO THE HOLDER HEREOF UPON WRITTEN REQUEST.]

[THE SECURITIES REPRESENTED BY THIS DOCUMENT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), AND MAY NOT BE SOLD, TRANSFERRED, OFFERED FOR SALE, PLEDGED, OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AS TO THE SECURITIES UNDER THE ACT OR AN OPINION OF COUNSEL SATISFACTORY TO SPIRIT AEROSYSTEMS HOLDINGS, INC. AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT REQUIRED.

THE SECURITIES REPRESENTED BY THIS DOCUMENT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), AND MAY NOT BE SOLD, TRANSFERRED, OFFERED FOR SALE, PLEDGED, OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AS TO THE SECURITIES UNDER THE ACT OR AN OPINION OF COUNSEL SATISFACTORY TO SPIRIT AEROSYSTEMS HOLDINGS, INC. AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT REQUIRED.

THE SECURITIES REPRESENTED BY THIS DOCUMENT ARE SUBJECT TO THE TERMS AND CONDITIONS, INCLUDING RESTRICTIONS ON TRANSFER, OF A STOCKHOLDERS AGREEMENT AMONG SPIRIT AEROSYSTEMS HOLDINGS, INC. AND ITS STOCKHOLDERS, AS AMENDED FROM TIME TO TIME, A COPY OF WHICH IS ON FILE AT THE PRINCIPAL OFFICE OF SPIRIT AEROSYSTEMS HOLDINGS, INC.

THE SECURITIES REPRESENTED BY THIS DOCUMENT ARE SUBJECT TO THE TERMS, CONDITIONS, RESTRICTIONS, AND CONTINGENCIES, INCLUDING RESTRICTIONS ON TRANSFER AND RISK OF FORFEITURE, CONTAINED IN THE SPIRIT AEROSYSTEMS HOLDINGS, INC. SHORT-TERM INCENTIVE PLAN, AS AMENDED FROM TIME TO TIME, A COPY OF WHICH IS ON FILE AT THE PRINCIPAL OFFICE OF SPIRIT AEROSYSTEMS HOLDINGS, INC.]

[THE SECURITIES REPRESENTED BY THIS DOCUMENT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), AND MAY NOT BE SOLD, TRANSFERRED, OFFERED FOR SALE, PLEDGED, OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AS TO THE SECURITIES UNDER THE ACT OR AN OPINION OF COUNSEL SATISFACTORY TO SPIRIT AEROSYSTEMS HOLDINGS, INC. AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT REQUIRED.

THE SECURITIES REPRESENTED BY THIS DOCUMENT ARE SUBJECT TO THE TERMS AND CONDITIONS, INCLUDING RESTRICTIONS ON TRANSFER, OF A STOCKHOLDERS AGREEMENT AMONG SPIRIT AEROSYSTEMS HOLDINGS, INC. AND ITS STOCKHOLDERS, AS AMENDED FROM TIME TO TIME, A COPY OF WHICH IS ON FILE AT THE PRINCIPAL OFFICE OF SPIRIT AEROSYSTEMS HOLDINGS, INC.

THE SECURITIES REPRESENTED BY THIS DOCUMENT ARE SUBJECT TO THE TERMS, CONDITIONS, RESTRICTIONS, AND CONTINGENCIES, INCLUDING RESTRICTIONS ON TRANSFER AND RISK OF FORFEITURE, CONTAINED IN THE SPIRIT AEROSYSTEMS HOLDINGS, INC. LONG-TERM INCENTIVE PLAN, AS AMENDED FROM TIME TO TIME, A COPY OF WHICH IS ON FILE AT THE PRINCIPAL OFFICE OF SPIRIT AEROSYSTEMS HOLDINGS, INC.]