GSC Power Division S2 Billet Camshafts SetGSC Power Division billet S2 camshafts for the 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. Notes: Check Pictures for cam
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