GSC Power-Division S1 (268 duration) cams for your Evo 4-8 are designed for those with the stock turbo or have up to a GT30/50 trim turbo. These cams will not sacrifice any bottom end loss over the stock cams and are designed for a rev range of 3000-8000rpms. These cams work well on the stock valve springs.
GSC Power-Division S2 (duration 272) cams are designed for those with a GT35R-GT4067 turbo, and are not suggested for those running smaller than a stock appearing turbo (see the S1 cams). These cams are great for 2.0L engines revving to 9000rpms or for Stroker motors revving to 8000rpms. The S2 cams do require upgraded valve springs.
GSC Power-Division S3 cams (280 duration) are designed for those with 800whp+ applications, and are recommended to used with large turbo applications. These cams are NOT recommended for anyone runing smaller than a 67mm or GT42R turbo.
GSC Power-Division S2 (duration 272) cams are designed for those with a GT35R-GT4067 turbo, and are not suggested for those running smaller than a stock appearing turbo (see the S1 cams). These cams are great for 2.0L engines revving to 9000rpms or for Stroker motors revving to 8000rpms. The S2 cams do require upgraded valve springs.
GSC Power-Division S3 cams (280 duration) are designed for those with 800whp+ applications, and are recommended to used with large turbo applications. These cams are NOT recommended for anyone runing smaller than a 67mm or GT42R turbo.
