GSC Power-Division Billet S2 camshafts for the 08+ Subaru STi EJ257 with Dual AVCS. These cams are built to suite the higher horsepower Subys. With a power range of 500WHP 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. *Check Pictures for cam placement. Long nose= Left Side, short nose - Right Side *Requires upgraded valve springs*
Check Pictures for cam placement. Long nose= Left Side, short nose - Right Side.
Due to the lobe size, head castings will need to be filled down slightly for clearance.
Proper break in and running high zinc oil is a must on flat tappet engines.