Allstar V-Belt Pulleys ALL31030,ALL31040,ALL31050

Allstar Aluminum SBC Reduction Crank and Water Pulleys

Made specifically for racing applications using short or Corvette water pumps. Pulleys work with Sweet style power steering pump and pulley to provide the CORRECT ratio, ensuring that the power steering pump and the water pump operate within the RPM range specified by General Motors. Stock pulley ratios do not provide the correct ratio for use in racing where the engine RPM differs greatly from street applications. In order to provide 30% water pump speed, and reduce weight and inertia, the crankshaft and water pump pulleys are smaller in diameter than standard reduction pulleys. The acceleration capabilities of the engine are greatly enhanced.Crank and Water Pump Pulleys

Allstar 31030 ALLSTAR PERFORMANCE Crankshaft Pulley, V-Belt, 2 Groove, 4-3/4 in Diameter, Aluminum, Natural, Short Water Pump, Small Block Chevy, FOR 1" MANDREL

Allstar 31040 ALLSTAR PERFORMANCE Water Pump Pulley, V-Belt 2 Groove, 6-5/8 Dia. Aluminum for Short Water Pump SBC Product Note: THIS PULLEY IS DESIGNED TO BE USED ON A 5/8 DIAMETER SHAFT WATER PUMP WITH A BLOCK MOUNTING FLANGE TO PULLEY MOUNTING FLANGE MEASUREMENT OF 5/5-8.

Allstar 31050 ALLSTAR PERFORMANCE Water Pump Pulley, V-Belt 2 Groove, 6-5/8 Dia. Aluminum for Short Water Pump SBC Product Note: THIS PULLEY IS DESIGNED TO BE USED ON A 3/4 DIAMETER SHAFT WATER PUMP WITH A BLOCK MOUNTING FLANGE TO PULLEY MOUNTING FLANGE MEASUREMENT OF 5-13/16.