2" Header & H.O. GREEN Cat Connection Kit. 2020+ F250/F350 Super Duty 7.3L 1998-pontiac-firebird-esi4271216 5" inner diameter)

5" inner diameter)

Used by top teams in NASCAR

5" ID coilover springs for S550 Mustangs using coilover struts

sized to one of 3 different coilover spring diameters

Our S550 vertical link is made from Anodized 2024-T351 Aluminum with 5/8" Teflon-lined FK Rod Ends threaded in at each end to prevent any deflection without any significant increase in noise

2" Header & H.O. GREEN Cat Connection Kit. 2020+ F250/F350 Super Duty 7.3L 1998-pontiac-firebird-esi4271216 5" inner diameter)Kooks 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