Moroso Single Groove Crankshaft Pulley - Chevrolet 396-454 - Single Groove - Pre-1969 (With Short Water Pump) - 30% Reduction - 5.25" O.D. Gibson Performance Exhaust The 4863 features a 1

The 4863 features a 1

the new Holley wedged floats weigh in at approximately 12

5 - 6 pulse ignition signals (1-12 cylinder engines)

even in dark pit areas

Using Mallory's time tested breakerless ignition circuit

Moroso Single Groove Crankshaft Pulley - Chevrolet 396-454 - Single Groove - Pre-1969 (With Short Water Pump) - 30% Reduction - 5.25" O.D. Gibson Performance Exhaust The 4863 features a 1Precision 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 Use 36 x 17 32" wide belt NOTE: Image shows #MOR64050 and is not representative of actual product shipped.