Subaru EJ257/EJ255 (AVCS Intake) Camshafts

GSC Power-Division billet S2 camshafts for the USDM STi and WRX with Intake only AVCS. These cams are built to suit the high 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 turbo capable of supporting 500+ WHP. Upgraded valve springs are required; beehive valve springs are recommended, but not required.

GSC Power-Division billet S3 camshafts for the USDM STi and WRX with Intake only 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.