GSC Power-Division 21-4N Intake Valve Set of 8-36mm (+1mm) (gsc2124-8) 18475 with dedicated customer service and

with dedicated customer service and continuous product improvements

When it comes to a high performance vehicle like the 991/991

Maximum Airflow for Maximum Performance Gains

you can finally HEAR your turbos - you can hear the rush of air being drawn into the turbines

With highly corrosion resistant

GSC Power-Division 21-4N Intake Valve Set of 8-36mm (+1mm) (gsc2124-8) 18475 with dedicated customer service andWhen 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