HTD Oil Pump Pulley 40t 1.25 Wide

The HTD Oil Pump Pulley 40t 1.25 Wide is a precision timing component designed for high-performance engine builds and stock-to-modified powerplant upgrades. This aluminum pulley synchronizes oil pump rotation with crankshaft speed using HTD (High Torque Drive) tooth geometry, ensuring reliable fluid circulation across full RPM ranges. Whether you're rebuilding a classic engine, tuning a street machine, or integrating aftermarket accessories, this 40-tooth pulley maintains critical cooling and lubrication delivery without slippage or wear typical of V-belt systems.

Machined from aluminum and finished in gray anodize, the HTD Oil Pump Pulley 40t 1.25 Wide features a 5/8-inch shaft bore for direct installation on standard oil pump drives. The 1.25-inch belt width accommodates HTD-profile timing belts, distributing load evenly across the tooth profile to eliminate the binding and slippage that plague traditional serpentine setups on modified engines running higher displacement or boost pressures. The 40-tooth count provides optimal speed ratios for oil pump displacement, balancing circulation volume against parasitic drag on the crankshaft—critical when every horsepower matters in competition or street applications.

This pulley suits engine builders transitioning from OEM rubber-belt systems to dedicated HTD timing systems, particularly in carbureted builds, vintage restorations, and forced-induction platforms where conventional belt slip compromises oil delivery. Mechanics upgrading to dry-sump or high-volume pump configurations will find this component essential for proper pump speed calibration. Installation pairs with matching HTD crankshaft and accessory pulleys; verify belt length and tooth count across your entire drive system before assembly to ensure repeatable, leak-free operation.