Feature●Compatible with all 1955-1998/99 Chevy Small Block Exhaust Headers with up to ½” Thick Flanges 265 283 305 307 327 350 383 400 (These do not fit oem manifolds)●Also Compatible with Pontiac Buick Oldsmobile 326 350 389 400 421 455 V8 Engines Using Exhaust Headers with up to ½” Thick Flanges (These do not fit oem manifolds)●These are High Grade 18-8 Stainless-Steel Steel 3/8-16x1” Bolts and Washers That will NOT rust or Corrode like the chrome or steel ones sold. These Use a 5/16” Allen Wrench/SocketDescription
Dress Up Your Small Block Engine with These Stainless-steel Header bolts. These are compatible with all Chevrolet Small Block V8 Engines 1955-1998 Including 283 305 307 327 350 383 400 TBI TPI LT1 LT4 5.0L 5.7L these also will work for Pontiac Buick Oldsmobile 326 350 389 400 421 455 V8 Engines running after market headers. These will not fit Factory cast iron exhaust manifolds. Comes with 12ea 3/8-16 x 1” Stainless-steel Socket cap Bolts and 12ea 3/8” Stainless-steel washers.