GSC S1 Billet Camshaft set - Subaru STI With Dual AVCS
GSC Power-Division Billet S1 Camshafts for the 2008-19 Subaru STI EJ257B With Dual AVCS. Good for stock frame turbo or up to 500 WHP (GT35R) upgrades. Upgraded valve springs are required; GSC Beehive valve springs are recommended but not required.
GSC Install Recommendations: