Exhibit 99.1

CERTIFICATION

Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906
of the Sarbanes-Oxley Act of 2002

        Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the undersigned officers of Wilson Greatbatch Technologies, Inc. (the "Company"), does hereby certify, to such officer's knowledge, that:

        The Quarterly Report on Form 10-Q for the quarter ended June 28, 2002 (the "Form 10-Q") of the Company fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: August 12, 2002	/s/ Edward F. Voboril Edward F. Voboril Chief Executive Officer
Dated: August 12, 2002	/s/ Lawrence P. Reinhold Lawrence P. Reinhold Chief Financial Officer