Water Pump Pulley - GM LS Series 4-Hole Polish.

The Water Pump Pulley - GM LS Series 4-Hole Polish from PRW Industries is a precision-engineered serpentine pulley system engineered to replace factory cooling system components on GM LS-platform engines. Built for both street performance and sustained high-rpm operation, this 83 mm deep aluminum pulley manages belt tension and water pump drive with the refined aesthetics that come from a polished finish. Whether you're building a crate-engine installation, upgrading a factory LS block, or restoring a muscle car platform, this OEM-compatible pulley ensures reliable cooling system function under demanding conditions.

Manufactured from lightweight aluminum and finished with a black-anodized coating for corrosion resistance, the Water Pump Pulley features a smooth serpentine profile and 4-bolt mounting pattern that interfaces directly with standard GM LS-series water pump shafts. The 83 mm depth specification is critical for belt alignment and proper serpentine drive routing; improper pulley depth can cause belt slip, premature wear, or cooling system inefficiency. The polished face provides both visual appeal and wear resistance, while the anodized aluminum construction minimizes thermal transfer and resists salt spray—essential factors in both high-heat engine bays and coastal climates. At 1.75 lbs, the pulley maintains ideal rotational mass for LS platform compatibility.

Professionals, engine builders, and enthusiasts restoring or customizing LS-based powerplants will benefit from this pulley's robust engineering and drop-in fitment. Installation requires only standard hand tools and takes less than an hour on most platforms. This pulley is compatible with all LS1, LS2, LS3, LS7, and LS9 variants, as well as truck-platform LS applications using factory serpentine belt systems. Verify your specific cooling system configuration and alternator setup before purchase to ensure correct belt routing and pulley alignment.