GSC Power-Division S1 Billet Camshaft Set 04-07 STI / 06-14 WRX / 05-12 Legacy / 04-13 Forester

Unlock your Subaru’s true performance potential with the GSC Power-Division S1 Billet Camshaft Set, engineered for 2004-2013 WRX STI, Legacy GT, and Forester XT models. This premium camshaft set enhances power and torque throughout the RPM range while maintaining strong low-end response, making it ideal for stock frame upgraded turbos or builds up to 500 WHP.

Crafted specifically for USDM Subaru WRX STI and WRX engines featuring intake-only AVCS, the S1 cams require upgraded valve springs—beehive springs are recommended for optimal performance. Installation demands precise cam placement and may require minor head casting modifications for clearance. Proper break-in procedures and use of high zinc oil are essential to ensure longevity and reliability, especially for flat tappet engines.

Designed for Subaru enthusiasts seeking a dependable, high-performance upgrade, this camshaft set is best installed by professionals to maximize results. Elevate your Subaru’s engine output and driving experience with this trusted upgrade from Subimods. Shop now to unlock enhanced power and torque tailored for your Subaru.