Moroso 64110 Moroso Chevrolet Small Block (w/Long Pump) Crankshaft Pulley - Double Groove - Cast Aluminum

Crankshaft Pulley, Cast, double groove, 50% reduction, SBC long water pump

• Fits: SBC and 90 Degree V6 Chevys, 1969-later (with long water pump)
• 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