SKU: 7025S1 | UPC: 617626702517
GSC Power-Division S1 Billet Cams 268/266 – Subaru WRX EJ255 & STI EJ257 w/ Intake AVCS (USDM)
The GSC 7025S1 delivers the top-selling street and track camshaft choice for 2004-2021 WRX EJ255 and STI EJ257 engines with intake-only AVCS in USDM models. Precision-ground from new high-nickel billet cores these 268° intake and 266° exhaust cams produce 30-55 whp gains on built motors. They ensure stable idle and daily drivability while supporting 400-700 whp setups.
Key Features
- 268° Intake / 266° Exhaust Duration @ 0.050": Balances power across RPM range for street track use
- 10.80 mm / 10.20 mm Lift: Clears stock or +1 mm valves safely with proper setup
- 100% New Billet Cores: Fresh USA-ground cores eliminate regrind risks no core charge
- Designed for 400–700 whp Builds: Matches E85 big turbo and strengthened bottom ends perfectly
- Made in the USA: Lifetime warranty covers manufacturing defects fully
Product Notes
- Fits all USDM EJ255 2004-2014 WRX and EJ257 2004-2021 STI with intake-only AVCS
- Will NOT fit dual AVCS heads on 2008+ STI models
- Valve spring upgrade required GSC 5041 beehive springs recommended
Installation Notes
- Professional installation and degreeing required
- GSC beehive springs and titanium retainers recommended
- Tune required after camshaft installation
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2014 | Subaru | Impreza WRX | EJ255 Intake AVCS |
| 2004-2021 | Subaru | WRX STI | EJ257 Intake AVCS only |
Why Choose GSC Power-Division?
- Official cam supplier to multiple 1000+ hp record-holding EJ builds
- Every cam ground from new USA-made billet cores
- Used by more championship-winning Subarus than any other brand
Frequently Asked Questions
-
Q: Will these work on my 2008–2021 STI with Dual AVCS?
A: No use GSC 7025S2 or 7025S3 for Dual AVCS heads. -
Q: Do I need a valve spring upgrade?
A: Yes GSC 5041 beehive kit is the perfect match. -
Q: Safe on stock valves?
A: Yes clears stock and +1 mm valves with proper machining.
Shipping & Handling
- Method: UPS/FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Official GSC box with foam protection approx. 26" x 7" x 7"
- Weight: 11 lbs
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