GSC Billet S1 Camshaft Set

Description:
GSC Power-Division Billet S1 camshafts for the 2008+ STI EJ257B With Dual AVCS. Good for stock turbo or up to 500WHP(GT35R) upgrades. Upgraded valve springs are required; Beehive valve springs are recommended but not required.

Features:
- Intake 266 / 225 @ .040" / Peak Lift 10.7MM / Centerline AVCS
- Exhaust 264 / 222 @ .040" / Peak Lift 10.4mm / Centerline AVCS

Notes:
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
Install to OEM shim spec's for intake and exhaust

Applications:
2008-2014 STI
2015-2021 STI