GSC Power Division 32mm Standard Exhaust Valves (Set of 8) Subaru 2002-2014 WRX / 2004-2020 STI

When GSC set out to create the best performing and longest lasting valves available, they knew they would need to turn to the cutting edge of design technology. All GSC Power-Division performance valves are created with advance 3D design and simulation programs, resulting in a stronger and higher flowing valve head concept. All prototype valves are precision tested against the competition to ensure the highest performing design available. Higher quality materials mean less head distortion for better sealing under extreme conditions and more consistent performance through the life of the valve. Features: •Swirl polished heads for smoother airflow over the valve•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.•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.•Fully nitrated ( this inclu