2-1/2" Comp. Only X-Pipe. 2005-2010 Mustang GT 4.6L 3V. Requires Kooks Headers. 2002 Pontiac Firebird ** 3-4 Week Lead Time

** 3-4 Week Lead Time - This kit is ready to bolt on out of the box**

Upper rear seat must be removed

and installation instructions for a factory quality installation

others will be linear and some will even have a progressive nature

Reduces under hood pressure delta to reduce front end lift and increase net vehicle downforce

2-1/2" Comp. Only X-Pipe. 2005-2010 Mustang GT 4.6L 3V. Requires Kooks Headers. 2002 Pontiac Firebird ** 3-4 Week Lead TimeKooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud