EXHIBIT 32

      CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
                                   PURSUANT TO
                                 18 U.S.C. 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, John Tucker, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of
Capstone Turbine Corporation on Form 10-Q for the quarterly period ended June
30, 2003 fully complies with the requirements of Section 13(a) and 15(d) of the
Securities Exchange Act of 1934 and that information contained in such Form 10-Q
fairly presents in all material respects the financial condition and results of
operations of Capstone Turbine Corporation.

Date: August 14, 2003                     By: /s/ JOHN TUCKER
                                              ---------------
                                                   John Tucker
                                   President and Chief Executive Officer

I, Karen Clark, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of
Capstone Turbine Corporation on Form 10-Q for the quarterly period ended June
30, 2003 fully complies with the requirements of Section 13(a) and 15(d) of the
Securities Exchange Act of 1934 and that information contained in such Form 10-Q
fairly presents in all material respects the financial condition and results of
operations of Capstone Turbine Corporation.

Date: August 14, 2003                     By: /s/ KAREN CLARK
                                              ---------------
                                                   Karen Clark
                                           Chief Financial Officer