super fast shipping
GSC Power Division engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full GSC Power Division lineup with fast shipping and expert fitment support — order with confidence.
The GSC Power Division S1 Billet Camshafts are the ideal upgrade for Subaru owners seeking improved power delivery without sacrificing daily drivability. Specifically engineered for the 2.5L EJ25 engine, these 268/266 duration cams provide a smoother idle and a broader torque curve compared to stock profiles.
These S1 cams are designed to work seamlessly with stock valve springs and retainers in many applications, making them a popular choice for enthusiasts looking for a reliable power increase. By optimizing the intake and exhaust valve events, these camshafts improve cylinder filling and exhaust scavenging, resulting in better throttle response and increased horsepower across the rev range. Whether you are building a spirited street car or a weekend track weapon, GSC Power Division provides the quality and performance you need. Trust your engine build to the experts at GGCRACING.
| Years | Make | Model | Trim |
|---|---|---|---|
| 2004-2007 | Subaru | Impreza | WRX STI |
Other popular GSC Power Division products customers consider together:
GSC Power Division engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full GSC Power Division lineup with fast shipping and expert fitment support — order with confidence.
The GSC Power Division S1 Billet Camshafts are the ideal upgrade for Subaru owners seeking improved power delivery without sacrificing daily drivability. Specifically engineered for the 2.5L EJ25 engine, these 268/266 duration cams provide a smoother idle and a broader torque curve compared to stock profiles.
These S1 cams are designed to work seamlessly with stock valve springs and retainers in many applications, making them a popular choice for enthusiasts looking for a reliable power increase. By optimizing the intake and exhaust valve events, these camshafts improve cylinder filling and exhaust scavenging, resulting in better throttle response and increased horsepower across the rev range. Whether you are building a spirited street car or a weekend track weapon, GSC Power Division provides the quality and performance you need. Trust your engine build to the experts at GGCRACING.
| Years | Make | Model | Trim |
|---|---|---|---|
| 2004-2007 | Subaru | Impreza | WRX STI |
Other popular GSC Power Division products customers consider together:
