Product Summary

Chevy Small Block V8, V-Belt Belt Type, .41" Belt Width

  • 20% reduction pulley set reduces water pump and fan speed which reduces parasitic losses and increase usable horsepower
  • CNC machined aluminum construction with deep grooves eliminates thrown belts
  • Ideal for circle track and other race engine operating above 6500 RPM
  • Double groove pulleys allow for other accessories to be used such as power steering pump and alternator
  • A matched pair of heavy duty belts are included so you don't have to search for the proper belt length

Comes as a Kit

Key Specs

MFG. Part #91015460
BrandSpeedway Motors
Material TypeAluminum

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Kit includes a cast aluminum double groove cast aluminum water pump pulley, crank pulley, and a matched pair of heavy duty belts. Slows water pump speed by 20% for increased horsepower.

  • Upper Pulley Grooves:  Two
  • Lower Pulley Grooves:  Two 
  • Upper Pulley Diameter:  6-5/8" O.D.
  • Lower Pulley Diameter:  5-7/16" O.D.
  • Upper Pulley Snout Hole:  5/8" O.D. (can be drilled out to 3/4")

Fits Small Block Chevy V8 with '55-'68 short-style water pump with 5/8" shaft.

Note: The lower crank pulleys in our combo kits are manufactured thicker than normal stock pulleys.  This requires longer 3/8" bolts to be purchased separately.  Allen head type bolts recommended. 

Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump.




MFG. Part #91015460
BrandSpeedway Motors
Material TypeAluminum
Belt TypeV-Belt
Belt Length32.625"
Belt Width.41"
Sold in QuantityKit
NotesIncludes crank and water pump pulleys. Two belts also included. 20% reduction.