Doug's Headers Full Length Headers 1-3/4" Primary 3.500" Diameter Collector Steel - Ceramic RG20003M Perfectly suited for use as

Perfectly suited for use as a single stage control with user programmable set point adjustment by 10 RPM increments

Black Thermal Coat

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Systems use the highest quality materials including 4130 chrome moly steel hardware

Doug's Headers Full Length Headers 1-3/4" Primary 3.500" Diameter Collector Steel - Ceramic RG20003M Perfectly suited for use asProduct Description: Headers Full Length 1. 875 in Primary 3. 5 in Collector Steel Ceramic Big Block Chevy GM F Body 1970 81 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. Our extra