HD Double Roller Timing Set - SBM

The CLOYES HD Double Roller Timing Set for small block Mopar engines represents a critical upgrade path for restorers, performance builders, and mechanics seeking reliable valve train synchronization. Timing chain systems are the backbone of engine operation—they synchronize crankshaft and camshaft rotation to control intake and exhaust valve timing with precision. This heavy-duty double roller design addresses a known weak point in early Mopar small blocks, where original equipment single-roller chains stretch and wear under daily driving, contributing to timing drift, rough idle, and potential valve-to-piston interference.

Double roller construction delivers increased chain rigidity and load capacity compared to single-roller chains, reducing elongation over thousands of miles and maintaining precise valve event timing. The 3-keyway adjustable design permits fine-tuning of cam timing without requiring cam gear replacement—a feature essential for builders dialing in idle quality, power band characteristics, and emissions compliance. Iron and steel construction throughout the sprockets and hardware ensures thermal stability and resistance to the expansion cycles inherent in modern fuels and higher operating temperatures. Weighing 3.45 lbs, this complete kit includes the timing chain, crankshaft sprocket, camshaft sprocket, and tensioner components required for a full replacement installation.

Mechanics and enthusiasts working on 318, 340, and 360 small block Mopar platforms benefit most from this upgrade when performing top-end rebuilds, cam swaps, or addressing noise and timing concerns in high-mileage engines. Installation is straightforward for anyone experienced with timing cover removal and crank/cam alignment procedures. Proper alignment and tensioning during installation ensure consistent valve train geometry and longevity; refer to manufacturer guidance and your engine's specific service manual for step-by-step installation. This kit delivers measurable improvements in cold-start reliability and mid-range power consistency on both stock and mildly modified applications.