Belt Guide-4.5in Dia. w/ 1/8in Keyway & 1in Hole

The MOROSO Belt Guide with 4.5-inch diameter is a precision-engineered pulley component designed to maintain proper belt alignment and tension in serpentine belt drive systems. Manufactured from aluminum with a natural finish, this belt guide features a 1-inch center hole and 1/8-inch keyway, providing secure mounting and positioning in engine compartments and accessory drive configurations where consistent belt tracking is critical.

The 4.5-inch pulley diameter and 1/16-inch thickness are engineered to guide belts through complex routing paths without binding or slippage. The 1/8-inch keyway accepts standard keystock to prevent rotational movement, while the 1-inch hole accepts common shaft diameters used in high-performance and street rod applications. Aluminum construction keeps weight minimal without sacrificing structural integrity, and the natural finish resists corrosion in typical under-hood environments. These specifications ensure smooth belt operation and extended component lifespan in both stock and modified engine setups.

This belt guide is ideal for engine builders, hot rod fabricators, and performance enthusiasts who require precise belt management in custom or high-output engine configurations. Proper belt guidance prevents flutter, reduces noise, and protects serpentine belts from wear caused by misalignment. The MOROSO brand is recognized for quality pulley and belt system components in both street and racing applications, making this guide a trusted choice for systems where belt reliability directly impacts engine performance and longevity.

Belt guides are essential in accessory drive systems where multiple belts or complex routing demands precision alignment. The lightweight aluminum construction and straightforward mounting design make this component suitable for retrofit installations and new builds alike, whether for naturally aspirated, forced-induction, or alternative-fuel engine platforms that use serpentine belt configurations.