HTD Oil Pump Pulley 38T 1.25 Wide

The HTD Oil Pump Pulley 38T 1.25 Wide is a critical engine accessory for builders and enthusiasts running high-performance or modified powerplants that require precision belt-drive synchronization. This HTD (Synchronous) pulley replaces factory or worn units on small-block engines, particularly those undergoing stroker builds, crate engine installations, or serpentine belt conversions. Whether you're upgrading cooling capacity, adding aftermarket alternators, or fine-tuning a race engine, the correct oil pump pulley ensures reliable fluid circulation and prevents belt slippage under load.

HTD profiling delivers positive gear engagement with matching serpentine or cog belt systems, eliminating the slipping common to V-belt designs under high RPM or accessory load. The 38-tooth configuration and 1.25-inch width specification conform to standard HTD belt sizing, making it compatible with factory or performance serpentine setups on applications like LS engines, small-block Chevrolets, and Fords. The lightweight aluminum or iron construction—combined with precision machining—reduces rotational mass while maintaining durability through thousands of thermal cycles. At 0.41 pounds and compact dimensions (4.55 x 1.85 x 5 inches), this pulley balances strength with minimal inertial penalty, ideal for high-RPM builds where every ounce matters.

This HTD Oil Pump Pulley 38T 1.25 Wide suits engine builders, street rodders, and performance shops transitioning from OEM or poly-V pulleys to modern HTD systems for improved belt geometry and load handling. Verify your engine block's pulley bore and keyway before ordering to ensure proper fitment; cross-reference your motor's year, displacement, and belt configuration against HTD pulley charts. Installation is straightforward—remove the old pulley, slide the new unit onto the oil pump shaft, secure the retaining bolt to spec, and tension the belt per manufacturer guidelines. Perfect for restomod projects, crate motor swaps, and any application where reliable, slip-free accessory drive performance is non-negotiable.