GSC Power-Division Billet S1 Camshafts for the 2008-21 Subaru STI EJ257B With Dual AVCS. Good for stock frame turbo or up to 500 WHP (GT35R) upgrades. Upgraded valve springs are required; GSC Beehive valve springs are recommended but not required.
Specs:
| 7026S1 | ADV Duration | Duration @ 0.040" | Peak Lift | Center Line |
| Intake | 264° | 226° | 10.80mm | 125° |
| Exhaust | 264° | 222° | 10.50mm | 128° |
GSC Install Recommendations:
- 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