GSC Power-Division Billet S3 camshafts for the USDM STi and WRX with Intake only AVCS. These cams are built to suite the high horsepower drag Subys. With a power range of 750-1000WHP and a rev range of 4500-9500rpms, you need some certain mods to utilize the true potential of the S3s. 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.
*Check Pictures for cam placement. Long nose= Left Side, short nose - Right Side
Intake 282 / 240 @ .040" / Peak Lift 11.3mm / Centerline AVCS
Exhaust 282 / 240 @ .040" / Peak Lift 11.3mm / Centerline 113
**Due to the lobe size, head castings will need to be filled down slightly for clearance.
*Proper break in and running high zinc oil is a must on flat tappet engines. Must be installed by an experienced technician*
*Requires upgraded valve springs*
Picked these up to replace a damaged set of Kelford cams. Impressed with the build quality of these as well as drivability, given the nature of the cams. So far, so good.