Description
7026S3
GSC Power-Division billet S3 camshafts for the 08+ Subaru STi EJ257 with Dual AVCS. These camshafts are built to suit high horsepower cars with a power range of 750-1000 WHP and a rev range of 4500-9500 RPMs.Specific engine modifications are required to utilize the true potential of these camshafts including a built bottom-end (sleeved or closed deck reccomended), built/ported heads (casting must be clearanced for higher lift), and upgraded valve springs. A standalone ECU or tune with speed density is highly reccomended in order for proper idle characteristics.
- Check Pictures for cam placement. Long nose = Left Side, short nose = Right Side
- Due to the lobe size head castings will need to be machined down 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
| 7026S3 | ADV Duration | Duration @ 0.040″ | Peak Lift | Center Line |
| Intake | 280° | 240° | 11.55mm | 130° |
| Exhaust | 280° | 241° | 11.60mm | 128° |
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