GSC Power-Division billet S1 camshafts for the EJ205 WRX Version 5 and 6. These will not drop any low end power, but actually cause faster spool of the turbo, creating more power and torque across the entire RPM range. Good for stock turbo or up to 500 WHP upgrades. These cams require upgraded valve springs to keep everything safe at high RPM.
*Check Pictures for cam placement. Long nose = Left Side, short nose = Right Side.