GSC Power-Division Billet S3 Camshafts Subaru EJ255/EJ257 Intake AVCS (WRX 2.5L 2006-2007 / STI 2004-2007) 282/282

GSC Power-Division Billet S3 Camshafts - Subaru EJ255/EJ257 Intake AVCS (WRX 2.5L 2006-2007 / STI 2004-2007) - 282/282 - Complete Set

GSC Power-Division has built a strong reputation producing high quality billet camshafts for serious performance builds, and the S3 series represents their most aggressive street and competition grind. Ground from solid billet for superior strength and consistency over cast alternatives, these cams target a power band of 750–1000 WHP with a usable rev range of 4,500–9,500 RPM.

This listing covers the complete GSC Power-Division Billet S3 camshaft set (intake and exhaust) for Subaru EJ255 and EJ257 engines fitted with intake-only AVCS. They are not suitable for 2008+ STI engines with dual AVCS. Check product images for correct cam placement — long nose installs on the left side, short nose on the right.

Important: These camshafts require significant supporting modifications to realise their full potential. A built bottom end (sleeved or closed deck strongly recommended), built and ported heads with casting clearanced for the higher lift profile, and upgraded valve springs are all required. A standalone ECU or a speed density tune is strongly recommended to achieve proper idle characteristics. Head castings must be filed down slightly for lobe clearance — confirm this during installation. Must be fitted by an experienced engine builder. High zinc break-in oil is mandatory on flat tappet engines.

Specifications

• Advertised duration (intake/exhaust): 282° / 282°
• Material: Billet construction
• AVCS compatibility: Intake only
• Target power range: 750–1000 WHP
• Target rev range: 4,500–9,500 RPM
• SKU: GSC7025S3

Please confirm your engine code and AVCS configuration before ordering.

Not sure if these camshafts suit your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.