Compatible with all OEM diameter factory and aftermarket (lowering) springs for S550
The other factor in our design parameters was the frustration that adjustable shocks and struts
The result has much better durability and wear characteristics than the undersized bearings used in some competitors' plates
Our lockout plates are CNC machined from 6061-T6 Billet Aluminum and supplied with Zinc plated grade 10
CrusaderTM rebound valving range may be easily revalved by the user
Stock Style BBC Header Flange - 3/8" Thick 304 Stainless -2" Primaries 1992-pontiac-firebird-esi4307584 Compatible with all OEM diameterKooks 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