COMP Cams GM LS Keyway Adjustable Billet Single Bolt Timing Set, 58x, 4 Pole Reluctor. COMP Cams Keyway Adjustable Billet Timing Sets include induction hardened, precision machined steel billet gears and pre-stretched, heat-treated double roller timing chains with heavy-duty large pin design. They feature a 9 keyway crank sprocket for 2 incremental adjustability with 8 maximum advance or retard. These timing sets are ideal for all street performance and race applications.
