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

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  • $1,058.68
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  • Regular price $1,245.50
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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.


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