Adjustable Double Roller Timing Set for 454-502 Big Block Chevrolet Gen VI

Include induction hardened Steel billet Gears for bullet proof durability. Feature infinitely adjustable Camshaft sprocket, 6-degree maximum advance/retard.3 keyway crank sprocket for additional 4-degree incremental adjustability. Pre-stretched, heat-treated single row chain with heavy-duty large pin design; chain available separately. Torrington Roller trust bearing reduces friction. Ideal for all street performance and race applications. NOTE: Can NOT be used with the factory fuel injection.