Westinghouse Air Brake Technologies (WAB) 10-Q 2005 Q1 Quarterly report

Exhibit 32.1

CERTIFICATION

Pursuant to 18 U.S.C. § 1350, the undersigned officers of Wabtec Corporation (the “Company”), hereby certify, to the best of their knowledge, that the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2005 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

By:	/s/    WILLIAM E. KASSLING
	William E. Kassling Chairman of the Board and Chief Executive Officer
Date:	May 9, 2005

By:	/s/    ALVARO GARCIA-TUNON
	Alvaro Garcia-Tunon Chief Financial Officer
Date:	May 9, 2005