Aluminum alloy main plate and steel alloy bearing holder construction - Tough as a tank
the Berserker™ allows for a broader force range curve allowing for strong enough valving to handle higher rate springs
the Berserker™ is a stronger design with better sealing characteristics since the Berserker™ is based off the Crusader™ platform and shares many premium
They are also very durable and don't break down like poly mounts do over time
Ford 5.0L Coyote Header Flange. 3/8" Thick SS. Ports for 2" Primaries. 1983-pontiac-firebird-esi2278290 Aluminum alloy main plate 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