3" x 2-3/4" SS GREEN Catted X-Pipe. 2015-2020 Shelby GT350. Retains OEM Mufflers 1991-pontiac-firebird-esi6483971 Installs easily with simple hand

Installs easily with simple hand tools in 2-3 hours

Other shock brands often recommend tuning from full tight

This entry includes a CNC machined upper spring perch

Significantly reduces under hood temperatures by extracting heat and allowing fresh cold air to enter the engine bay

Tighten these nuts

3" x 2-3/4" SS GREEN Catted X-Pipe. 2015-2020 Shelby GT350. Retains OEM Mufflers 1991-pontiac-firebird-esi6483971 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