GSC S2 Billet Camshaft Set – Subaru EJ257 Dual AVCS (GSC7026S2)
Built for High-Power EJ257 Applications
The GSC Power-Division S2 Billet Camshaft Set is designed for 2008+ Subaru STI models running the EJ257 engine with Dual AVCS. These cams are engineered for serious horsepower builds starting at 500 WHP and up, offering aggressive lift and duration for turbocharged setups with strong top-end performance.
Recommended Engine Setup
- Built motor with forged internals
- Ported cylinder heads for optimal flow
- Upgraded valve springs required (beehive preferred but not mandatory)
- Advanced engine management system for proper tuning
Installation Notes
- Head castings may need minor clearance due to lobe size
- Flat tappet engines require high-zinc oil and proper break-in
- 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 | 128° |
Fitment Guide
- 2008–2021 Subaru WRX STI 2.5L Turbo DOHC (EJ257 Dual AVCS)
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