COMP Cams 3110 Timing Chain Set for 1965-1996 Chevrolet Big Block 396-454 EnginesHi Tech Roller Race Timing Sets; Chevy 396 454, '65 96 Cast Iron camshaft gear and induction hardened billet steel crank sprocket Feature 3 keyway crank sprocket for 4 degree incremental adjustability, 4 degree maximum advance retard Pre stretched, heat treated double roller chain with heavy duty large pin design; chain available separately Dynamically balanced and quality checked for run out tolerances Ideal for all street performance and race