Water Pump Pulley SBC Short Water Pump Double

The Water Pump Pulley SBC Short Water Pump Double from Specialty Products Company is a precision-engineered serpentine pulley designed for small-block Chevy engines running short-style water pumps. This component is essential for builders and mechanics modernizing classic or performance SBC applications with updated cooling systems. The double-groove configuration enables efficient belt drive operation while maintaining proper pulley alignment and load distribution across the engine's accessory drive system.

Manufactured from steel and finished in durable black paint, this pulley features a 6.4-inch outer diameter optimized for short water pump installations on small-block Chevy platforms. The two-groove design accommodates modern serpentine belt layouts, reducing parasitic drag compared to older multi-belt systems while improving cooling efficiency. The compact footprint—measuring 6.25 x 2.5 x 6.25 inches and weighing just 1.74 lbs—integrates seamlessly into tight engine bays without requiring extensive block modification or clearance work.

This pulley is ideal for SBC stroker builds, restomod projects, and cooling system upgrades where short water pumps provide better weight distribution and packaging advantages. It's commonly paired with electric fans, updated thermostat housings, and modern serpentine belt systems to eliminate traditional mechanical fan drag. Proper installation requires verification that your short water pump shaft matches the pulley bore diameter and that all bolt holes align—consult your engine build documentation or machine shop to confirm fitment before purchase.