Doug's Full Length Headers - 1-7/8 in Primary - 3 in Collector - Silver Ceramic - GM LS-Series - GM Fullsize Truck 1963-72 (Pair) R010003YM 100'' intake and 1

100'' intake and 1

High Energy Polylock

1984-1989 Chevrolet P20

head socks

Chevrolet 396/402/427

Doug's Full Length Headers - 1-7/8 in Primary - 3 in Collector - Silver Ceramic - GM LS-Series - GM Fullsize Truck 1963-72 (Pair) R010003YM 100'' intake and 1Product Description: Headers Full Length 1. 875 in Primary 3 in Collector Steel Silver Ceramic GM LS Series GM Fullsize Truck 1963 72 Pair Dougs Headers, the most respected name in the header industry since the 60s, began in 1958 as a small muffler shop in East Los Angeles, California. Every Dougs header comes with all the necessary mounting hardware, collector reducers or connector pipes, premium gaskets and detailed installation instruction sheets.