Keyway Adjustable Billet Timing Set for .005" Undersized BBC 396-454

Induction hardened and precision machined Steel billet Gears for bullet proof durability. Feature 9 keyway crank sprocket for 2-degree incremental adjustability, 8-degree maximum advance/retard. Pre-stretched, heat-treated double Roller timing chain with heavy-duty large pin design. Includes Torrington Roller thrust bearing for reduced friction. Ideal for all street performance and race applications.