W/P Pulley Gilmer 28T

The W/P Pulley Gilmer 28T by Peterson Fluid is a precision water pump pulley designed for high-performance engine builds and serpentine belt drive systems. This lightweight component is essential for mechanics and enthusiasts upgrading cooling systems on small-block engines where precise pulley geometry is critical. Its 28-tooth configuration is particularly suited for custom engine packages, LS swaps, and performance cooling applications.

Machined from durable aluminum, the W/P Pulley Gilmer 28T features a Gilmer tooth profile, which is a synchronous design that minimizes belt slip and ensures consistent pulley velocity ratios across engine RPM ranges. This design delivers optimal belt tension and wrap angle for water pump drives, making it a crucial component in forced-induction and high-RPM applications. Peterson Fluid pulleys are manufactured to tight tolerances, ensuring concentricity with the water pump shaft and reducing vibration that can degrade belt life.

Engine builders transitioning from traditional V-belt systems to modern serpentine drives will find this pulley particularly beneficial. It is also ideal for calibrating belt drive ratios on both carbureted and fuel-injected street engines. Weighing just 0.63 lbs, the compact 28-tooth design integrates seamlessly into tight engine bays and works well with Peterson Fluid's complete line of products.