GSC Power-Division Exhaust Valves 33mm (+1mm) for the Subaru EJ20/257 Engine

When 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 programs 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 face than any of the tested designs. Less distortion allows or better sealing under extreme conditions and more consistent performance threw the life of the valve.  GSC Power-Division's new valves are sure to become the industries standard for sport compact performance valves.