GSC S2 Billet Camshaft Set – Subaru EJ255 / EJ257 Intake AVCS (GSC7025S2)
Built for Big Power EJ Applications
The GSC Power-Division S2 Billet Camshaft Set is designed for USDM Subaru WRX and STI models equipped with intake-only AVCS. These cams are engineered for high-output builds targeting 500 WHP and beyond. To fully unlock their potential, a built motor, ported heads, and a turbo capable of supporting serious airflow are essential.
Installation Notes & Requirements
- Upgraded valve springs are required; beehive springs are preferred but not mandatory
- Head castings may need minor clearance work due to lobe size
- Flat tappet engines require high-zinc oil and proper break-in procedures
- Professional installation is strongly recommended
Camshaft Identification
Refer to product images for cam placement:
Long nose = Left Side
Short nose = Right Side
Camshaft Specifications
| Camshaft | ADV Duration | Duration @ 0.040" | Peak Lift | Center Line |
|---|---|---|---|---|
| Intake | 272° | 233° | 10.80mm | 125° |
| Exhaust | 272° | 233° | 10.50mm | 115° |
Fitment Guide
- 2004–2007 Subaru WRX STI 2.5L Turbo DOHC (EJ257 Intake AVCS)
- 2006–2014 Subaru WRX 2.5L Turbo DOHC (EJ255 Intake AVCS)
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