Chevy (Long primaries Both sides over frame) Fits American Made, Barry Wright, Larry Shaw, GRT, Stinger, TNT, Bullitt, Raider, and Rayburn. WILL NOT FIT GRT COMPUTER CAR 605 OFF-SET This header is for crate late model chevy engines. It has 1 5/8" tubes stepped to 1 7/8" and has 3" collectors |