HTD Pulley 20 Tooth Spline Drive

The HTD Pulley 20 Tooth Spline Drive from Peterson Fluid is a precision crankshaft pulley engineered for builders and enthusiasts seeking reliable belt drive synchronization on custom and high-performance engines. This universal aluminum pulley serves as the critical link between your engine's crankshaft and accessory systems, whether you're running a serpentine setup or standalone belt configuration. It's the go-to choice for engine builders, hot rodders, and serious fabricators who demand tight timing accuracy and repeatable performance from their drive systems.

Constructed from gray anodized aluminum, this 20-tooth HTD pulley features a spline drive interface that locks positively to your crankshaft mandrel without slip, eliminating the timing inconsistencies common to friction-fit pulleys. The 8 mm pitch HTD tooth profile ensures smooth, efficient power transfer to alternators, water pumps, and power steering units while minimizing belt wear. At 1.02 inches wide with a 1.25 inch mandrel bore, it accommodates standard HTD belt widths and integrates seamlessly into both classic and contemporary engine bays. The spline-drive design means no keyway shearing or creep under load—critical for engines pushing high RPM or experiencing rapid acceleration cycles.

This pulley excels in custom engine builds where timing precision matters: street performance engines, LS swaps, big-block conversions, and race platforms all benefit from its solid mechanical interface. Installation requires a matching spline bore on your crankshaft or hub adapter—verify your mandrel specifications before ordering. Weighing just 0.14 lbs, it adds minimal rotating mass while maintaining the structural integrity necessary for sustained high-load operation. Whether you're upgrading a tired original pulley or engineering a complete powertrain from scratch, the Peterson HTD Pulley 20 Tooth Spline Drive delivers the accuracy and durability that separates amateur builds from professional-grade results.