GSC Camshafts EJ257B Dual AVCS Impresa WRX STI 08-17

GSC's 7000 Series billet camshafts deliver the performance and reliability that import enthusiasts demand. These cams feature GSC Power-Division's proven lobe profiles, engineered to maximize power output while maintaining smooth, predictable drivability across the RPM range. The dark nitride finish provides exceptional wear resistance, improved lubrication properties, and outstanding corrosion protection for long-term durability. As the only affordable billet camshaft option readily available for sport compact platforms, the 7000 Series sets the standard others aspire to match. Built to perform, designed to last. 

GSC S1

GSC Power-Division billet S1 camshafts for the 2008+ STI EJ257B With Dual AVCS. Good for stock frame turbo or up to 500 WHP (GT35R) upgrades. Upgraded valve springs are required; Beehive valve springs are recommended but not required.

GSC S2

GSC Power-Division billet S2 camshafts for the 08+ Subaru STi EJ257 with Dual AVCS. These cams are built to suit the higher horsepower Subis. With a power range of 500 WHP and up, you need some certain mods to utilize the true potential of the S2s: built motor, with a built/ported head, and a good engine management system. Upgraded valve springs are required; beehive valve springs are recommended but not required.

GSC S3

GSC Power-Division billet S3 camshafts for the 08+ Subaru STi EJ257 with Dual AVCS. These camshafts are built to suit high horsepower cars with a power range of 750-1000 WHP and a rev range of 4500-9500 RPMs.  Specific engine modifications are required to utilize the true potential of these camshafts including a built bottom-end (sleeved or closed deck reccomended), built/ported heads (casting must be clearanced for higher lift), and upgraded valve springs.  A standalone ECU or tune with speed density is highly reccomended in order for proper idle characteristics.

Vehicle Fitment:

Subaru STI 2008-2017