COMP Cams Adjustable Timing Sets come equipped with a Torrington roller thrust bearing which reduces friction. They include durable, induction hardened steel billet gears and a pre-stretched, heat-treated double roller chain with heavy-duty large pin design. COMP Cams Adjustable Timing Sets feature an infinitely adjustable camshaft sprocket with 6? maximum advance or retard along with a 3 keyway crank sprocket for additional 4? incremental adjustability. These timing sets are ideal for all street performance and race applications.