Exhibit 32

CERTIFICATIONS OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO
RULE 13a-14(b) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED,
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Capstone Turbine Corporation (the “Company”) on Form 10-Q for the quarterly period ended December 31, 2003, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), John Tucker, Chief Executive Officer of the Company, and Karen Clark, Chief Financial Officer of the Company, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), that the Report complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

  By: /s/ JOHN TUCKER
John Tucker
President and Chief Executive Officer
 

  By: /s/ KAREN CLARK
Karen Clark
Chief Financial Officer
 

Date: February 13, 2004