GSC Power Division BMW S58 & B58 Engine STD Intake ValvesWhen creating these intake valves, GSC created 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. GSC flow test prototype valve heads in specific applications to make sure it has the highest flowing valve head available on the market today. With the materials used, we have less valve distortion at the face than any