Manley Race Roller Timing Chain Kit - Small Block Ford 4-1 POLISHED S.S. HEADER Available for your Duramax

Available for your Duramax

Comes with 2 4CYL distribution block

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Manley Race Roller Timing Chain Kit - Small Block Ford 4-1 POLISHED S.S. HEADER Available for your DuramaxFully 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