Hedman Hedders # 62740 is a 1.75” x 3” 304 Stainless Steel mid-length tube Header via Marken Performance. It is for installing a LS Series engine swap into a 1967-87 Chevy/GMC C10 / C15 pick-up trucks models 2WD. Hedman's unique, gasketless ball and socket collector design allows your exhaust system to bolt up, even if it is not perfectly aligned with the header collectors. This can be used on both automatic transmission and manual transmission. Kit includes: Headers, Head Flange Gaskets & Bolts, Collector Bolts, socket style exhaust system adapters (reducers). Hedman is so confident in the quality of its headers that these headers are factory backed by a Limited Lifetime Warranty.