The GSC Power-Division S2 cams for the Mitsu Evolution X are designed for those with 600HP+ in mind. Gains of 40-80whp (depending on Turbo) have been seen by simply bolting the S2 cams in. • Designed for a rev range of 3800-8500rpms • The S2 cams require an upgraded valve spring. • Intake 274 / 230 @ .050" / Peak Lift 11.2mm • Exhaust 274 / 230 @ .050" / Peak Lift 11.0mm