GSC Power-Division Spring Seats are now available for the Subaru Turbo EJ series. The GSC1005 is an OEM...
GSC Power-Division Super Alloy Exhaust Valves for EJ20/25 Turbo are for those running high horsepower, high EGT set...
GSC Power-Division Traditional Intake Valve Guide for Subaru EJ20/25 Series (EJ205, EJ207, EJ257, EJ257B), smooth style
GSC Power-Division Traditional Exhaust Valve Guide for Subaru EJ20/25 Series (EJ205, EJ207, EJ257, EJ257B), smooth style
The GSC Power-Division Single Cylindrical Valve Spring with Ti Retainer for the Subaru EJ platforms includes 16 titanium...
When creating our new valve line we set out to create the best performance, longest lasting valves available...
GSC Power-Division Super Alloy Exhaust Valves for EJ20/25 Turbo are for those running high horsepower, high EGT set...
When creating our new valve line we set out to create the best performance, longest lasting valves available...
GSC Power-Division Traditional Intake Valve Guide for Subaru EJ20/25 Series (EJ205, EJ207, EJ257, EJ257B), smooth style
  Max RPM: 9,500 RPM Max boost: 35+ psi The GSC Power-Division Beehive Valve Spring Kit with Ti...
Intake: ADV Duration 272* Duration @0.040" 230* Peak Lift 10.80mm Center Line 125* Exhuast: ADV Duration 272* Duration...
The ARP Cam Tower Stud Kit is available for those rebuilding or performing major maintenance to the 4G63....
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