1-7/8" Stainless Headers & Comp. Only Conn. Kit. 2015-2023 Mustang GT 5.0L. 2001 Pontiac Firebird The compression valving options are

The compression valving options are the same as the Crusader Series

installation is actually pretty easy

Or you can open up the hole ever so slightly and fit the nut/washer included and accommodate it

race and off-road applications

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

1-7/8" Stainless Headers & Comp. Only Conn. Kit. 2015-2023 Mustang GT 5.0L. 2001 Pontiac Firebird The compression valving options areKooks 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