SKU: 7025S2 | UPC: GSC7025S2
GSC Power-Division 2004-2007 Subaru Impreza WRX STI EJ255/EJ257 USDM w/Intake AVCS S2 Cams 272/272 Billet
GSC Power-Division S2 camshafts fit 2004-2007 USDM Subaru Impreza WRX STI models equipped with EJ255 or EJ257 engines featuring Intake AVCS. These billet cams offer 272-degree duration at 1mm lift and .370-inch (9.4mm) lift on both intake and exhaust for enhanced mid-range torque and top-end horsepower. Ideal for boosted track or street applications seeking reliable power delivery.
Key Features
- Billet Steel Cores: Provide exceptional strength to handle high-RPM abuse and extended durability in demanding conditions.
- 272-Degree Duration: Optimized lobe profiles shift powerband for immediate throttle response and strong pull from 4500 RPM upward.
- .370-Inch Lift: Increases valve opening for improved airflow and cylinder filling boosting peak power by 25+ whp with proper tune.
- Intake AVCS Compatibility: Retains factory variable valve timing on intake side for smooth low-end drivability and low-speed manners.
- CNC Precision Ground: Profiles dyno-developed for Subaru EJ25 turbo engines ensuring consistent gains across RPM range.
Product Notes
- Valve spring upgrade required to match lift and prevent coil bind Supertech dual springs recommended.
- ECU tune essential after install to adjust for cam timing and fuel ignition maps.
- Ships in protective tube packaging to prevent damage during transit.
Installation Notes
- Professional installation recommended.
- Perform full timing belt service during cam swap using OEM or upgraded belt.
- Compatible with stock cam trays and bolts no special hardware needed.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2007 | Subaru | Impreza | WRX STI |
Why Choose GSC Power-Division?
- Leading camshaft specialist for Subaru motorsport with profiles used in championship-winning builds.
- USA-made with rigorous dyno testing for proven real-world performance.
- Advanced CNC grinding ensures perfect lobe symmetry and longevity.
Frequently Asked Questions
-
Q: Will these cams fit 2008+ STI models?
A: No these are for USDM 2004-2007 STI with Intake AVCS only. Use GSC 7030S2 for 2008-2021 dual AVCS EJ257. -
Q: What material are the cores made from?
A: High-strength billet steel cores with custom bronze-throated followers for reduced wear and precise oiling. -
Q: What warranty is provided?
A: GSC offers a one-year warranty against manufacturing defects with lifetime core exchange program available.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Custom protective tube 28 x 5 x 5 inches
- Weight: 7.8 lbs
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