6 rib 56mm Serpentine Pulley

Get the right pulley for your high-output alternator. The 6-Rib 56mm Serpentine Pulley is designed for hairpin-style alternators and provides the smaller diameter needed to spin the alternator faster for maximum output at all RPM ranges.

Pulley Specifications

• 6-Rib Design — Standard serpentine belt compatibility
• 56mm Outside Diameter — Smaller than stock for higher alternator RPM
• Hairpin Alternator Fitment — Designed for hairpin-style alternator shafts

Notes

• A shorter serpentine belt is required when using a smaller diameter pulley
• Replacement pulley for JS Alternators high-output alternator builds

Pro Tip: A smaller pulley means the alternator spins faster at any given engine RPM, which is especially important at idle. If your electrical demands are high and you need strong charging at low RPM, the right pulley size makes all the difference.