2-1/2" Comp. Only X-Pipe. 2005-2010 Mustang GT 4.6L 3V. Requires Kooks Headers. 2002 Pontiac Firebird others will be linear and

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

Upper rear seat must be removed

it is critical that everything is kept extremely clean

and slide the wheel inboard or outboard to change camber

There are no expensive “special tools” required to be purchased from Viking

2-1/2" Comp. Only X-Pipe. 2005-2010 Mustang GT 4.6L 3V. Requires Kooks Headers. 2002 Pontiac Firebird others will be linear andKooks 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