Older set of Hooker Super Comps. Fits 70 - 81 GM F-bodies (Camaro, Firebird) and 75 - 79 GM X bodies (Nova, Omega, Skylark) with small block. 1 3/4 primary tubes, heavy flange. Small hole near collector will need to be welded up and a dent in one tube on bottom. Had these on a 73 Z/28 and they fit great. Part number R2117. New sets sell for around $700. If interested, do your own research to make sure they will fit your application. I put a light coat of Rustoleum high heat spray paint to stop surface rust. Use contact seller and I will get back to you. Thanks.