Valve tips are either hardened or have a stelite wafer tip fused so that the tip is within 5 Rockwell C of the rocker or valve tappet for extended life and less wear.Intake valves are a modified 21-4n stainless and exhausts are a modified 23-8n stainless material for high heat capacity while maintaining longevity.Valve stems are micro polished to allow for less oil retention on the stem, which creates less drag on the stem to guide for a smoother motion.Back cut to reduce valve weight for higher RPM, higher boost pressure, and allow for more aggressive cam profiles without increasing valve spring seat pressures.Swirl polished heads for smoother air flow over the valve.GSC Power-Division's new valves are sure to become the industry standard for sport compact performance valves. Less distortion allows for better sealing under extreme conditions and more consistent performance throughout the life of the valve. With the materials used, we have less valve distortion at the face than any of the tested designs. 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. Using advanced 3D design and simulation software, we have created a stronger and higher flowing valve head design. When creating our new valve line we set out to create the best performance, longest lasting valves available to the aftermarket. Subaru EJ20 JDM/Euro WRX & STi INTAKE AVCS Valve Guides.Subaru EJ20 JDM/Euro WRX & STi INTAKE AVCS Valves.Subaru EJ20 JDM/Euro WRX & STi INTAKE AVCS Valve Spring Kits.Subaru EJ20 JDM/Euro WRX & STi INTAKE AVCS Camshafts.
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Subaru EJ20 WRX NON AVCS Valve Spring Kits.Subaru EJ257/EJ255 (AVCS Intake) Valve Guides.Subaru EJ257/EJ255 (AVCS Intake) Valves.Subaru EJ257/EJ255 (AVCS Intake) Valve Spring Kits.Subaru EJ257/EJ255 (AVCS Intake) Camshafts.Subaru EJ257B DUAL AVCS Valve Spring Kits.GSC Power-Division Intake Valve +1mm for 4G63T > Evo 9 Valves > GSC Power Division: Performance Camshafts and Valvetrain