HD Timing Chain

The HD Timing Chain by Brian Tooley Racing is a precision-engineered single-roller timing chain designed for GM LS-series engines from 1997 through 2009. This component is essential for high-performance and stock engine builds alike, as it synchronizes crankshaft and camshaft rotation with absolute accuracy. Whether you're rebuilding a classic LS motor, upgrading an existing engine, or performing routine maintenance, a quality timing chain is non-negotiable for reliable operation and longevity.

Brian Tooley Racing's HD design utilizes single-roller construction, which reduces friction and wear compared to inferior alternatives while maintaining precise timing geometry. The single-roller profile minimizes drag on the crankshaft sprocket and intermediate shaft, improving overall engine efficiency and reducing parasitic horsepower loss. This timing chain is manufactured to OEM and beyond standards, ensuring compatibility with factory LS engine architecture while delivering the durability demanded by both street and race applications. The compact dimensions (2.95 x 1 x 5.05 inches) and light weight (0.56 lbs) reflect efficient engineering without compromising structural integrity.

LS engine enthusiasts—from weekend warrior mechanics to serious performance shops—trust Brian Tooley Racing timing chains for their reliability and fit. This single unit is ideal for complete engine rebuilds, worn chain replacement, or upgrading to a more robust timing system before forced-induction modifications. Installation requires removal of the front cover and crankshaft damper; proper tensioning and alignment are critical to engine health. The HD Timing Chain is sold individually and pairs seamlessly with Brian Tooley Racing's full lineup of LS timing components and gaskets for a comprehensive, coordinated upgrade.