For 1967-1974 GMC C25/C2500 Pickup Timing Chain Cloyes 99421YKQV 1968 1969 1970

Cloyes parts are CAD designed and manufactured using premium materials. Notes: Engine Timing Chain -- High Performance "Z" Racing Chain, 60 Links; High Performance; with Double Roller Chain. A timing chain synchronizes the rotation of the crankshaft and camshaft(s), ensuring proper timing of the engines valve events for each cylinder.