Part Number: 7025SX

Description: GSC P-D Billet Camshafts

Fitment: 08-14 Subaru WRX EJ255/EJ257 with intake-only AVCS

Notes: Not for sale in California not CARB Legal

Details:

• Available in S1, S2, and S3 profiles to suit street, mid-level, or full race/high-horsepower builds

• Each cam profile is engineered to improve torque and horsepower across the rev range while matching the intended build level

• Designed for USDM Subaru EJ255/EJ257 engines with single-intake AVCS

• Upgraded valve springs, cam clearance checks, and proper tuning are recommended, especially for S2 and S3 cams

Product Details
The GSC Power‑Division camshaft lineup for USDM Subaru EJ255/EJ257 engines with single‑intake AVCS offers three levels of performance: S1, S2, and S3. The S1 cams are a street‑friendly upgrade, featuring roughly 268° intake and 266° exhaust durations, designed to provide increased power and torque while maintaining good spool and drivability, ideal for moderately built engines and daily drivers. The S2 cams are a more aggressive option, with durations around 272° intake and 272° exhaust, suited for higher horsepower builds with larger turbos or ported heads; they require upgraded components and careful tuning, and while they offer greater performance, they may compromise idle smoothness and low‑end spool. The S3 cams are the most extreme, with durations around 282° intake and exhaust, intended for high‑rpm, high‑horsepower race builds; these require a fully built engine, ported heads, standalone engine management, and advanced supporting modifications, and are less practical for street use due to reduced low‑end torque and drivability. Overall, the S1, S2, and S3 cams provide a clear progression from streetable performance to full race capability, allowing builders to choose based on their power goals and intended use.

S1:

Description: 7000 Series Billet Core Camshaft Set; Stage 1 Profile; For Upgraded Turbo/Head/Motor, 300-500WHP; Fast Spooling No Loss of Bottom End Power; Upgraded Springs Required

Lift: Intake 10.4mm / Exhaust 10.1mm

Duration: Intake 266 / Exhaust 266

S2:

Description: 7000 Series Billet Core Camshaft Set; Stage 2 Profile; For Upgraded Turbo/Head/Motor, 500-750WHP; Fast Spooling No Loss of Bottom End Power; Upgraded Springs Required

Lift: Intake 10.5mm / Exhaust 10.2mm

Duration: Intake 272 / Exhaust 272

S3:

Description: 7000 Series Billet Core Camshaft Set; Stage 3 Profile; For Upgraded Turbo/Head/Motor, 750-1000WHP; Fast Spooling No Loss of Bottom End Power; Upgraded Springs Required

Duration: Intake 282 / Exhaust 282

Lift: Intake 11.3mm / Exhaust 11.3mm