GSC Power-Division S3 Billet Camshaft Set 04-07 STI / 06-14 WRX / 05-12 Legacy / 04-13 Forester

Unlock the full potential of your Subaru WRX STI, Forester XT, or Legacy GT with the GSC Power-Division S3 Billet Camshaft Set. Designed specifically for USDM models with intake-only AVCS, these premium camshafts deliver exceptional performance for high horsepower builds ranging from 750 to 1000 WHP. Experience a broad rev range of 4500-9500 RPMs, perfect for enthusiasts seeking aggressive power gains and precise engine response.

Crafted from billet steel, the S3 camshafts require specific engine upgrades, including a built bottom-end (sleeved or closed deck recommended), ported heads with clearance for higher lift, and upgraded valve springs. Proper tuning with a standalone ECU or speed density setup is essential for optimal idle and performance. Installation demands an experienced technician and careful break-in with high zinc oil to protect flat tappet lifters.

Ideal for Subaru performance enthusiasts focused on serious power upgrades, this camshaft set is a must-have for track or street builds. Elevate your Subaru’s engine performance—shop the GSC S3 camshafts now at Subimods.