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SKU: 7025S3 | UPC: GSC7025S3
GSC Power-Division Subaru EJ255/EJ257 USDM w/Intake AVCS S3 Cams 282/282 Billet 2004-2007 Impreza WRX STI
GSC Power-Division S3 primary camshaft set delivers precise engine timing for 2004-2007 Subaru Impreza WRX STI models equipped with EJ255 or EJ257 USDM engines and Intake AVCS. These billet cams feature 282 degree advertised duration on intake and exhaust to build power across the RPM range while improving throttle response and turbocharger spool. Ideal for enthusiasts chasing track-ready performance from stock-based turbo setups.
Key Features
- Billet Single Core Design: Delivers strength to handle high RPM and boost levels beyond stock limits
- DLC Coated Lobes: Cuts friction for smoother operation longer lobe life and consistent valve timing
- Intake Specs: 282° advertised duration 12.50mm lift at 1mm for strong mid-range torque and power
- Exhaust Specs: 282° advertised duration 12.00mm lift at 1mm boosts exhaust flow and scavenging
- Dyno Proven Profiles: Tested for real gains in horsepower torque and response on EJ257 turbo applications
Product Notes
- Requires upgraded valve springs such as GSC S2 or S3 springs and titanium retainers for safe operation
- Best paired with 25+ psi boost levels and supporting mods like intake exhaust and tuning
- Valve lash settings Intake 0.008 inch Exhaust 0.010 inch for peak performance
Installation Notes
- Professional installation recommended.
- Verify timing chain tensioner and guides during cam swap for reliability
- Compatible with OEM cam trays sprockets and timing components with proper spring upgrade
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2007 | Subaru | Impreza | WRX STI |
Why Choose GSC Power-Division?
- Backed by motorsport testing on drag strip and road course Subaru builds
- Cams built in USA with tolerances under 0.0005 inches for exact fit and function
- Cam profiles developed from thousands of hours of dyno data on EJ25 engines
Frequently Asked Questions
-
Q: Do these cams fit 2004-2005 STI models?
A: Yes they install on 2004-2007 Impreza WRX STI EJ255/EJ257 USDM with Intake AVCS using stock timing gear and upgraded springs -
Q: What materials are used in construction?
A: Billet 8620 steel cores with DLC diamond-like carbon coated lobes for wear resistance and low friction -
Q: What warranty coverage applies?
A: 1-year limited warranty on lobes lifetime on cores against manufacturing defects with proof of proper installation
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective cardboard tube inside box 30 x 8 x 6 inches
- Weight: 5.8 lbs
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