please look at the photo below
as often the first 10+ clicks provide no changes to the valving
The rear down tubes also mount to a supported portion of the unibody structure
They are also very durable and don't break down like poly mounts do over time
Included in kit: Templates for cutting
Toyota 5.7L V8 Header Flange - 3/8" Thick Stainless. Ports for 1-7/8” Primaries. NA please look at the photoKooks 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