GSC S1 Billet Camshaft Set Dual AVCS (2008-2021 STI)

GSC Power-Division Billet S1 Camshafts for the 2008-21 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.Specs: 7026S1 ADV Duration Duration @ 0.040" Peak Lift Center Line Intake 264° 226° 10.80mm 125° Exhaust 264° 222° 10.50mm 128° GSC Install Recommendations: Check Pictures for cam placement. Long nose = Left Side. Short nose = Right Side Due to the lobe size, head castings will need to be filed down slightly for clearance - Please check during install