Exhibit 32.1

                                  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/A for the quarter ended April 1, 2005 (the
"Form 10-Q/A") 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/A fairly presents, in all material respects, the
financial condition and results of operations of the Company.



 Dated: December 16, 2005             /s/ Edward F. Voboril
                                      ------------------------------------------
                                      Edward F. Voboril
                                      President and Chief Executive Officer and
                                      Chairman of the Board



Dated: December 16, 2005              /s/ Thomas J. Mazza
                                      ------------------------------------------
                                      Thomas J. Mazza
                                      Senior Vice President and
                                      Chief Financial Officer


This certification is being furnished solely to accompany this Form 10-Q/A
pursuant to 18 U.S.C. Section 1350, and is not being filed for purposes of
Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise, and
is not to be deemed incorporated by reference into any filing of the Company
except to the extent the company specifically incorporates it by reference
therein.


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