SKU: MOR23560
UPC: 084663235603
MPN: 23560
The Moroso Belt Guide with 2.5-inch diameter, 1/8-inch keyway, and 1-inch hole (MOR23560) is an essential pulley management component designed for serious engine builders and street performance enthusiasts. This aluminum belt guide maintains precise alignment of serpentine belts and accessory drive systems on high-revving or heavily modified engines where vibration and belt slip pose reliability risks. Whether you're running a stroker motor, supercharged engine, or custom accessory configuration, a quality belt guide prevents premature wear and catastrophic accessory drive failure during aggressive acceleration or extended boost conditions.
Constructed from aluminum and finished in natural raw form, the 1/16-inch thick belt guide features a 1-inch mounting hole for secure attachment to engine block or timing cover bosses via the supplied 1/8-inch keyway interface—a design that eliminates rotational slippage under load. The 2.5-inch diameter pulleys sold as a pair provide dual-point contact that centers the belt in the serpentine path, reducing lateral deflection and distributing load evenly across the belt width. This controlled geometry reduces noise, minimizes stretch, and extends alternator, water pump, and air conditioning compressor bearing life on modified powerplants running higher belt tension or unconventional pulley ratios.
Professional engine builders and drag-strip competitors rely on Moroso belt guides to maintain accessory drive integrity during peak output and transient boost events. Installation requires locating the pre-drilled 1-inch hole on a clean engine surface, keying the component into position, and securing with appropriate fasteners—a straightforward retrofit on most V8 and modular motor platforms. At 0.08 pounds, the lightweight aluminum construction adds negligible weight while delivering measurable reliability gains on forced-induction, nitrous oxide, or high-RPM naturally aspirated combinations where belt slippage directly compromises charging and cooling system performance.
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