Manley Race Roller Timing Chain Kit - Big Block Chevrolet - Shim

Fully machined steel crankshaft sprocket with three keyways enabling different settings: -4, 0, or +4 degrees of timingCast camshaft sprocket with Torrington thrust bearing or brass wear shimRoller chain designed with .250" diameter rollersChevrolet kits include a brass wear shim or a captive Torrington bearing