GSC Power Division

GSC Power-Division makes valve guides that fit properly, easier to install and shaped to help air flow instead of just copying the OEM design. GSC's valve guides are made from true C67410 Manganese...

GSC Power-Division valve guides with depth stop fit properly, are easier to install and shaped to help air flow instead of just copying the OEM design. GSC's valve guides are made from true C67410...

GSC Power-Division valve guides with depth stop fit properly, are easier to install and shaped to help air flow instead of just copying the OEM design. GSC's valve guides are made from true C67410...

GSC P-D Subaru/Scion BRZ/FR-S FA20 Manganese Bronze Exhaust Valve Guide - Set 8

GSC P-D Subaru/Scion BRZ/FR-S FA20 Manganese Bronze Intake Valve Guide - Set 8

GSC Power-Division makes traditional exhaust valve guides that fit properly, easier to install and shaped to help air flow instead of just copying the OEM design. GSC's Subaru EJ20 / EJ25 exhaust...

GSC Power-Division traditional valve guides fit properly are easier to install and shaped to help air flow instead of just copying the OEM design. GSC's valve guides are made from true C67410...

GSC set out to create the best performance, longest lasting Subaru oversize (+1) 37mm intake valves available to the aftermarket. Using advanced 3D design and simulation programs GSC created a...

GSC P-D EJ series EJ205/EJ207/EJ257 Chrome Polished Super Alloy Exhaust Valve-32mm Head(STD)

GSC P-D Subaru EJ20/EJ257 Turbo Chrome Polished Super Alloy Exhaust Valve - 33mm Head (+1mm) -Single

GSC P-D Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 37mm Head (+1mm) - Single

GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 33mm Head (+1mm) - Single

GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 36mm Head (STD) - Single

GSC P-D Subaru/Scion BRZ/FR-S FA20 21-4N Chrome Polished Intake Valve - 35mm Head (STD) - Single

GSC P-D Subaru/Scion BRZ/FR-S FA20 Chrome Polished Exhaust Valve - 29mm Head (STD) - Single

GSC'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...

GSC'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...

GSC'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...

GSC'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...

GSC set out to create the best performance, longest lasting Subaru intake valves available to the aftermarket. Using advanced 3D design and simulation programs GSC created a stronger and higher...

Running high horsepower with high EGT's requires a valve that will last in 2000F conditions. GSC 32mm standard size Super Alloy Exhaust valves have chrome polished stems to create a smooth, durable...

Running high horsepower with high EGT's requires a valve that will last in 2000F conditions. GSC 33mm +1 Oversize Super Alloy Exhaust valves have chrome polished stems to create a smooth, durable...

GSC Power-Division 6mm Viton Valve Stem Seal set for the Subaru EJ257, EJ207 and EJ205. GSC's Viton stem seals are able to cope with higher heat than the OEM seals which reduces wear in and tear in...

GSC P-D 4G63T Evo 4-9 OD .4750in ID .2598in OL 1.950in Exhaust Valve Guide - Single

GSC P-D Subaru EJ257/EJ207/EJ205 Viton 6mm Valve Stem Seal Set