GSC Billet S1 Camshaft set for Subaru EJ255/7 with Intake AVCS

Brand: GSC

Product Code: GSC7025S1

Availability:In stock

$956.25 956.25


  • ADV Duration 268*
  • Duration @0.040" 225*
  • Peak Lift 10.80mm
  • Center Line 125*


  • ADV Duration 268*
  • Duration @0.040" 225*
  • Peak Lift 10.40mm
  • Center Line 115*


GSC Power-Division billet S1 camshafts for the USDM STi and WRX with Intake only AVCS. These will not drop any low end power, and will create more power and torque across the entire RPM range. Good for stock frame upgraded turbos or up to 500 WHP upgrades. Upgraded valve springs are required; beehive valve springs are recommended, but not required.

  • Check Pictures for cam placement. Long nose = Left Side, short nose = Right Side
  • Due to the lobe size, head castings may 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