GSC P-D Chrome Polished Exhaust Valves 33mm Head (+1mm) - Subaru WRX 2002-2014 / STi 2004-2020 (Set of 8; +Multiple Subaru Fitments) 1994 2008-2014 Subaru STi w/ 8mm

2008-2014 Subaru STi w/ 8mm Reservoir Pipe

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testing proves that they are no more powerful than the factory coils that are found on 1

Complete flow curves from 35 to 120 PSI and current draw vs

Equipping your MK5 or MK6 2

GSC P-D Chrome Polished Exhaust Valves 33mm Head (+1mm) - Subaru WRX 2002-2014 / STi 2004-2020 (Set of 8; +Multiple Subaru Fitments) 1994 2008-2014 Subaru STi w/ 8mmWhen designing these valves, GSC used advanced 3D design and simulation programs to create a stronger and higher flowing valve head design. Prototypes were used in the specific applications to make sure that they have the highest flowing valve head that is available on the market today. The materials they have used have less valve distortion at the face than any of the tested designs which allow for better sealing under extreme conditions to promote