Alt. Pulley 6-Groove 65mm OD

The Alt. Pulley 6-Groove 65mm OD is a precision serpentine pulley designed for alternator drive systems in automotive applications. This 6-rib pulley is engineered to transfer power efficiently from the engine's crankshaft to the alternator, maintaining consistent belt tension and rotational engagement. Built to OEM specifications, this pulley is essential for vehicles requiring reliable charging system performance and is ideal for engine rebuilds, alternator upgrades, or serpentine belt system replacements.

Constructed from durable steel and finished with cadmium plating for corrosion resistance, the Alt. Pulley 6-Groove 65mm OD delivers long-term reliability in engine compartments. The 6-groove design matches standard serpentine belt profiles, ensuring proper belt seating and minimizing slip during high-load conditions. Its 65mm outer diameter and 2.56-inch pitch diameter are optimized for Powermaster Alternators and compatible charging systems, providing the mechanical advantage needed for efficient power transmission while maintaining consistent alternator RPM ratios across engine speed ranges.

Mechanics, engine builders, and restoration enthusiasts rely on the Alt. Pulley 6-Groove 65mm OD for OEM-quality serpentine pulley replacement. Installation is straightforward—simply mount to the alternator shaft and align with the engine's crankshaft pulley and idler pulleys. The cadmium plating resists rust and extends service life in harsh under-hood environments. Verify belt alignment and tension after installation to optimize charging output and prevent premature belt wear. This pulley is sold individually and weighs 0.84 lbs, making it a practical, cost-effective component for any complete charging system overhaul.