Doug's Side Pipes - Silver 21411610 Single ovate wire valve springs

Single ovate wire valve springs

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

1999-2013 GMC Sierra 1500

Full-color

No need to remove from car to adjust

Doug's Side Pipes - Silver 21411610 Single ovate wire valve springsProduct 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.