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GSC Power Division billet S1 camshaft kit for Subaru EJ255/EJ257 (USDM) engines with intake AVCS includes S1 cam profiles specified as 268/266 in billet construction. The matched cam set is designed to work with engines equipped with intake AVCS, offering revised cam timing characteristics for tuned turbo applications while preserving compatibility with the AVCS-equipped intake system.
GSC P-D Subaru EJ255/EJ257 (USDM) w/Intake AVCS S1 Cams 268/266 Billet
