GSC Power Division Billet S1 Camshaft Kit Subaru WRX STI (EJ257 Dual AVCS) 266/264

GSC Power Division Billet S1 Camshaft Kit - Subaru WRX STI (EJ257 Dual AVCS) - 266/264

GSC Power Division are a well-regarded name in forced induction engine building, known for producing billet camshafts that deliver reliable power gains without sacrificing streetability. These S1 cams are a popular first step for Subaru WRX STI owners chasing more top-end grunt from their EJ257, offering a meaningful lift in power while remaining compatible with factory valvetrain components.

This listing covers the GSC S1 Billet Camshaft Kit for the Subaru WRX STI equipped with the EJ257 engine and Dual AVCS (Active Valve Control System). This applies to GR/GV chassis STI models from 2008 onwards. These cams are ground from billet steel for improved strength and consistency over reground OEM cores.

Important: These camshafts are designed for Dual AVCS EJ257 engines only. Confirm your specific build configuration before ordering, as compatibility varies across EJ257 variants.

Specifications

• Intake duration: 266°
• Exhaust duration: 264°
• Construction: Billet steel
• AVCS compatibility: Dual AVCS
• Application: Subaru EJ257 (WRX STI, 2008+)
• Kit includes: Intake and exhaust camshafts (full set)
• Part number: 7026S1

Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please ensure your vehicle's year, trim level, and engine configuration are confirmed before ordering.

Not sure if this kit suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.