3" SS Competition Only OEM Connections. 2020+ F250/F350 Super Duty 7.3L 2020-chevrolet-camaro-esi6216722 The difference is in the

The difference is in the rebound valving

we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated

Twin Cam engines and latest 6 speed Cruise Drive

Viscosity Index 140

3" SS Competition Only OEM Connections. 2020+ F250/F350 Super Duty 7.3L 2020-chevrolet-camaro-esi6216722 The difference is in theKooks 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