GSC Power-Division Billet S3 Camshafts Subaru EJ257 Dual AVCS

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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°