High Performance Timing ChainA timing chain synchronizes the rotation of the crankshaft and camshaft(s), ensuring proper timing of the engines valve events for each cylinderCloyes parts are CAD designed and manufactured using premium materials. Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performanceCloyes recommends the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced as these components play a vital role in system stability and accurate timingFrom stock replacement to high performance, Cloyes has the most complete timing chain catalogKeep your engines valvetrain in perfect time with Cloyes, the world leader in timing drive systemsOur chains are engineered and manufactured with precision pitch control for proper chain-to-sprocket tooth fitmentRefer to our online catalog for detailed application-specific informationChain, TimingHigh Performance 3/8″ Pitch Single Roller Replacement TRUE Roller Chain. 0.250″ Roller Diameter. Heat Treated and Processed Links to Maximize Ultimate Breaking Strength while Remaining Ductile for Toughness. Pre-stressed to Increase Fatigue Life.HP Timing Chain