Small block Chevrolet short pump reduction pulley combo

20% reduction pulley set reduces water pump and fan speed, reduces parasite losses and enables horsepower. CNC machined aluminum construction and deep grooves eliminate thrown belts. Perfect for circle trucks and other race engines above 6500 RPM. Double groove pulley can be used with other accessories such as power steering pump and alternator. A pair of matching heavy duty belts is included, so you don't have to worry about finding the right belt length.

Kit includes cast aluminum double groove cast aluminum water pump pulley, crank pulley, and matching heavy duty belt. Slows water pump speed by 20% and increases horsepower. Upper pulley groove: 2 pieces Lower pulley groove: 2 pieces. Upper pulley diameter: 6-5/8" outside diameter. Lower pulley diameter: 5-7/16" outside diameter. Upper Pulley Snoot Hole: 5/8" OD. (Can be drilled up to 3/4") Small block fits Chevrolet V8 with short style water pump with 5/8" shaft. NOTE: The lower crank pulley in our combo kit is manufactured thicker than the regular stock pulley. This requires a longer 3/8 inch bolt. Available for purchase separately. Allen head type bolts are recommended. Learn which water pumps and get the right pulley for your application as explained in our technical article. SBC - Short vs. Long Water Pump.


Manufacturer: ‎Speedway Motors
Brand: ‎Speedway Motors
Product size: ‎20.32 x 20.32 x 20.32 cm; 2.27 kg
Manufacturer reference: ‎91015460
Product Dimensions: Depth x Width x Height: 20.3 x 20.3 x 20.3 cm Product weight: 2.27 Kilograms