Doug's Side Pipes - Silver 21411610 This turbulence breaks up the

This turbulence breaks up the fuel which creates a more complete combustion cycle increasing horsepower

Phantom Flex Stealth Fuel System Aeromotive's Phantom line of universal in-tank fuel systems goes green with the new Phantom Flex

weld-in 3-1/2" long threaded pipe adapters

No need to remove from car to adjust

1999-2013 GMC Sierra 1500

Doug's Side Pipes - Silver 21411610 This turbulence breaks up theProduct Description: Exhaust Side Pipes Side Tube 44 3 4 in Long 4 in Inlet 4 in Outlet Steel Silver Ceramic Chevy Corvette 1963 82 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.