GSC Power-Division Super Alloy Exhaust Valve +1mm Oversized Set of 12 (gsc2053-12) 1111 The plenum also includes a

The plenum also includes a permanently adhered flange gasket that is to be used with the factory gasket as well as a new throttle body gasket

and precision computer numberic control (CNC) manufacturing ensures an accurate fit

increase in performance

This race designed exhaust makes the majority of its power in the upper RPM band

and a RIGID favorite

GSC Power-Division Super Alloy Exhaust Valve +1mm Oversized Set of 12 (gsc2053-12) 1111 The plenum also includes aWhen creating our new valve line we set out to create the best performance, longest lasting valves available to the aftermarket. Using advanced 3D design and simulation software, we have created a stronger and higher flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on the market today. With the materials used, we have less valve distortion at the