GSC Power-Division +1mm Exhaust Valves - Subaru WRX VA Cobb and function checked in the

and function checked in the USA for unparalleled quality control prior to shipping

000 miles)

DOT compliant and are 100% tested to a pressure of 4500 psi

WRX/STI 15-17 Front Right 35-300083 Strut Assembly

GSC Power-Division +1mm Exhaust Valves - Subaru WRX VA Cobb and function checked in theGSC's set out to create the best performance longest lasting valves available to the aftermarket by using advanced 3D design and simulation programs they created a stronger and higher flowing valve head design. GSC flow tested prototype valve heads in specific applications to make sure they produced the highest flowing valve head available on the market today. The materials used create less valve distortion at the face than any of the tested designs.