Save 15%
GSC Power-Division Viton Valve Stem Seals for the WRX & STI include the entire 6mm valve size seal set (8 intake and 8 Exhaust)so you will have...
View full details
Sold out
GSC's Dual AVCS S2 camshaft set for the Subaru STI is designed for those running a GT35R or larger turbo. Stage 2 cams are great for Subaru STI own...
View full details
Save 15%
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 desig...
View full details
Save 15%
GSC Power-Division Beehive valve springs use an ovate wire which utilizes advanced material heat treatment methods for superior load loss capabilit...
View full details
Sold out
The GSC Super Alloy Exhaust Valves which have been designed to accommodate those with high horsepower and high EGT sets that need a valve that can ...
View full details
Save 15%
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 c...
View full details
Save 15%
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 desig...
View full details
Save 15%
GSC set out to create the best performance, longest lasting Subaru oversize (+1) 37mm intake valves available to the aftermarket. Using advanced 3D...
View full details
Save 15%
GSC Power-Division Billet S3 camshafts for the USDM STi and WRX with Intake only AVCS. These cams are built to suite the high horsepower drag Subys...
View full details
Save 15%
GSC Power-Division Billet S1 camshafts for the USDM STi and WRX with Intake only AVCS. These will not drop any low end power, and will creating mor...
View full details
Save 15%
STAGE 2: GSC's S2 camshaft set is designed for those running a GT35R or larger turbo. Stage 2 cams are great for Subaru owners running a GT35R turb...
View full details
Sold out
GSC's S1 camshaft set for the Dual AVCS equipped STI is designed for the stock turbo all the way to a GT35R. The horsepower range for the GSC Stage...
View full details
Save 15%
Features Swirl polished heads for smoother air flow over the valve Back cut to reduce valve weight for higher rpm, higher boost pressure and allow ...
View full details
Save 15%
Features Swirl polished heads for smoother air flow over the valve Back cut to reduce valve weight for higher rpm, higher boost pressure and allow ...
View full details
Save 15%
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 desig...
View full details
Save 15%
Features Swirl polished heads for smoother air flow over the valve Back cut to reduce valve weight for higher rpm, higher boost pressure and allow ...
View full details
Save 15%
Features Swirl polished heads for smoother air flow over the valve Back cut to reduce valve weight for higher rpm, higher boost pressure and allow ...
View full details