GSC Billet Cams for 2008-2021 STi

GSC Power-Division Billet Camshafts for the 2008+ STi. S1, S2 and S3 cams are available. Sold as a set of 4 camshafts.

Vehicle Fitment:
2008-2021 Subaru STi
*EJ257 Dual AVCS


7026S1 S1 Cams (268/268)
Good for stock turbo or up to 500 WHP (GT35R) upgrades. Upgraded valve springs are required, Beehive valve springs are recommended but not required.

7026S2 S2 Cams (272/272)
These cams are built to suit the high horsepower Subi's. With a power range of 500 WHP and up, you need some certain mods to utilize the true potential of the S2: built motor, with a built/ported head, and a good engine management system. Upgraded valve springs are required, beehive valve springs are recommended but not required.

7026S3 S3 Cams (282/282)
These cams are built to suit the high horsepower drag STi. With a power range of 750-1000 WHP and a rev range of 4500-9500 RPMs, you need some certain mods to utilize the true potential of the S3: built motor, with a built/ported head (clearanced for lift), and a standalone engine management system. Upgraded valve springs are required, beehive valve springs are recommended but not required.

Install Notes:
• Check Pictures for cam placement. Long nose = Left Side, short nose = Right Side
• Due to the lobe size, head castings will need to be filed down slightly for clearance (Please check during install)
• Proper break in and running high zinc oil is a must on flat tappet engines
• Must be installed by an experienced technician
• Check AVCS advance during install - must be done by experienced engine builder