PULLEY CHEV SB LOWER 2 GROOVE LWP ALL 4in OD -50%

Moroso crankshaft pulley, V-Belt, 2-Groove, 4.04 inch aluminum natural suits Chevrolet Small Block long pump. Moroso cast aluminum crankshaft pulleys have a small diameter that slows fan, water pump, and alternator speeds to reduce horsepower-robbing drag. They also have extra-deep grooves to provide added belt retention during rapid changes in engine rpm. They are precision-machined from high-grade, lightweight, aluminum castings.