GSC Power-Division Exhaust Valve Guide Set (gsc3083-8) 2 sometimes dubbed an x51 package

sometimes dubbed an x51 package by Porsche

Each Spring Individually Tested

This air intake system was developed to accommodate the engines factory emissions control devices including the engine breather hose and inlet air temperature sensor

Mount the winglets on the car in the matte black or choose the unpainted option and color match to your paint scheme

One-piece carbon fiber sheet for consistent weave and enhanced strength

GSC Power-Division Exhaust Valve Guide Set (gsc3083-8) 2 sometimes dubbed an x51 packageWhen 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