Upgrade your 2008-2021 Subaru WRX STI with the GSC Power-Division S2 Billet Camshaft Set, designed for high horsepower EJ257 engines with Dual AVCS. These premium billet camshafts unlock the true potential of your built motor, delivering reliable performance for power levels starting at 500 WHP.

Built specifically for Subaru enthusiasts pushing their engines to the limit, the S2 cams require supporting modifications including a built or ported head and upgraded valve springs—beehive springs recommended for optimal results. Due to the larger lobe size, slight filing of the head castings is necessary for proper clearance. Proper break-in procedures and high zinc oil use are essential for flat tappet longevity. Installation should be performed by an experienced technician to ensure peak performance and durability.

Ideal for serious Subaru WRX STI builders aiming for top-end power gains, this camshaft set is a must-have upgrade. Shop now at Subimods and enhance your Subaru’s engine management and power delivery with trusted performance parts.