Doug's Full Length Headers - 1-7/8 in Primary - 3 in Collector - Silver Ceramic - GM LS-Series - GM Fullsize Truck 1963-72 (Pair) 42046 1988-1990 GMC C1500

1988-1990 GMC C1500

Integrated Notifications For High Beams And Turn Signals As Well As Instrument Warnings And A User Selectable Warning Light

276 in Rectangular Port

For Exhaust on Big Block Chevy applications with Aluminum heads

1975-1990 Pontiac Firebird

Doug's Full Length Headers - 1-7/8 in Primary - 3 in Collector - Silver Ceramic - GM LS-Series - GM Fullsize Truck 1963-72 (Pair) 42046 1988-1990 GMC C1500Product 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.