1990-92 Chevy ZR1 Corvette full length high-flow catted headers. 2″ tuned length primary tubes, 3/8″ CNC laser cut flanges. All tubes are CNC mandrel bent for optimal flow. Made from 304 stainless steel for maximum corrosion resistance. Port Matched to factory cylinder heads with oval ports. These headers make awesome power and are dyno proven to make over 30 RWHP more than factory manifolds. Excellent fitting headers. Includes 3″ ball socket and 3″ bend and clamps to connect to factory connection points. Mill finish, All TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA. Fits factory exhaust or Stainless Works 3″ exhaust systems (P/N ZR1C or ZR1S).