The GSC Power-Division Billet S1 cams for the Mitsu Evolution X are designed for those with the stock turbo up to the 550hp range These cams will not sacrifice any bottom end loss over stock cams; nothing but gains and will promote faster spooling of the upgraded turbos. Gains of 20-50whp (depending on Turbo) have been seen by simply bolting the S1 cams in.
The GSC Power-Division billet S2 cams for the Mitsubishi Evo X are designed for those with 600+ HP in mind. Gains of 40-80 WHP (depending on turbo) have been seen by simply bolting the S2 cams in.
The GSC Power-Division billet S3 cams for the Mitsubishi Evo X are designed for those with 800+ HP in mind. Thoroughly tested in the English Racing/ETS Evo X to ET's as low as 8.35 at over 174mph in the 1/4 mile.