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Cranshaft Pulleys, 3.900 in. Diameter, Serpentine, 6-Groove, 15 Percent Underdrive, Long Water Pump, Aluminum, Black, Three Bolt, Chevy, Each

PSC's underdrive crankshaft pulleys are designed to increase engine horsepower by reducing the amount of power required to drive external accessories. All pulleys are CNC-machined from billet aluminum, exceeding factory quality. Order the pulley that's designed for your application needs.