Air Pump V-Belt Pulley

The MOROSO Air Pump V-Belt Pulley (MOR64885) is a precision-engineered accessory drive component designed for vehicle builders and performance enthusiasts upgrading or replacing air management systems. This pulley synchronizes rotational power from the engine belt to auxiliary air pump equipment, making it essential for custom cooling loops, pneumatic suspension systems, or supercharger intercooler setups. Whether you're fabricating a restomod or fine-tuning a high-output engine bay, a quality pulley ensures reliable belt engagement and eliminates slippage that can compromise system performance.

Machined from aluminum and finished in black anodize, this air pump pulley features a single V-groove profile with a 5-inch outer diameter and a 3 x 1.16-inch bolt circle, allowing secure mounting to virtually any universal air pump head. The anodized coating resists corrosion and UV degradation in engine compartments exposed to heat cycles and moisture, extending service life without requiring protective coatings or sealants. Lightweight aluminum construction keeps rotating mass low—critical for minimizing parasitic drag on the serpentine belt system—while the precision groove geometry guarantees consistent power transfer and eliminates belt walk that can lead to misalignment or premature wear.

This universal pulley suits custom engine builds, LS swaps, vintage hot rods, and any platform where OEM air pump provisions are absent or modified. Installation requires only basic mechanical skill: bolt the pulley to your air pump hub, tension the belt, and verify smooth rotation under load. At 0.59 lbs and compact 6.85 x 1.15 x 9.6-inch footprint, it integrates cleanly into tight engine bays without interfering with headers, intake manifolds, or alternators. Verify your belt width and pump bolt pattern before ordering to ensure compatibility with your accessory drive layout.