Moroso 64070 - Pulley, Crank, SBC

Cast Aluminum Crankshaft Pulley 68 Down SBC w/Short Water Pump 4.00 in. OD Single Groove • Precision machined from high grade, lightweight aluminum castings • Extra-deep belt grooves provide added belt retention during rapid changes in engine RPM • Small pulley diameter slows fan, water pump, and alternator speed to reduce horsepower-robbing drag • High RPM water pump operation is improved, reducing impeller speed below cavitation threshold • Uses 36° x 17/32" wide belt