3" Cat-Back (X-Pipe) w/Black Tips. 2018-2020 Mustang GT 5.0L. Connects to OEM. 2002 Pontiac Firebird Installs easily with simple hand

Installs easily with simple hand tools in 2-3 hours

and clevises

Vorshlag upper spring perches are included and built to fit the strut style you select (see "Spring Perch" drop down option menu

A progressive valve will have a softer low-speed force that ramps up very quickly as shaft speed increases

Other shock brands often recommend tuning from full tight

3" Cat-Back (X-Pipe) w/Black Tips. 2018-2020 Mustang GT 5.0L. Connects to OEM. 2002 Pontiac Firebird Installs easily with simple handKooks 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