GSC Power Division S3 Billet Performance Camshaft Kit EJ25 GRB/F STI DAVCS

Billet S3 camshafts for the 08+ Subaru STI EJ257 with Dual AVCS. They are built for high-horsepower cars in the 750-1000 WHP power range and a 4500-9500 rpm rev range.

Specific engine modifications are required to use their full potential:

• Built bottom end (sleeved or closed deck recommended)
• Built/ported heads; the casting must be clearanced for the higher lift
• Upgraded valve springs

A standalone ECU or a tune with speed density is highly recommended for proper idle characteristics.

Part number: GSC7026S3