GSC Power-Division billet S2 cams for the VVTI Toyota Supra 2JZ-GTE. The only forged billet core *** VVTi Camshafts on the market. The S2 profile is designed for those running a large single turbo, turbos larger than 71mm typically. These cams will not have bottom end losses over our S1 cams on larger frame turbos. Gains of 60-100 WHP (depending on turbo) have been seen by simply bolting the S2 cams in and reshimming. These camsrequire upgraded valve springs. GSC Power Division VVTI S2 Camshafts