Product Summary

265, 267, 283, 302, 305, 307, 327, 350, 2 Groove Count

  • This pulley fits the small block Chevy short water pumps
  • Features a cast aluminum construction and natural finish
  • Has a 5/8" centering hole and dual bolt pattern
  • Pulley measures 6.65" OD and provides a 20% reduction
  • Superior belt retention with extra-deep grooves

Key Specs

MFG. Part #91015482
BrandSpeedway Motors

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Speedway Motors 91015482 Details

Speedway Cast Aluminum double groove pulleys for Small Block Chevy feature a 20% reduction. Reduction pulleys have a smaller diameter which slows the speed of your fan, water pump, and alternator to reduce drag for more top-end horsepower. Plus, high RPM water pump operation is improved due to reduced fluid cavitation.

  • Machined from lightweight cast aluminum
  • Superior belt retention with extra-deep grooves
  • 20% reduction slows accessories down for less drag
  • Adds top-end horsepower
  • Reduces water pump impeller speed below cavitation threshold
  • Improved high-RPM cooling capabilities
  • 910-15482
    • 6-5/8" O.D.

Available for Short style pumps (55-68). Fits a 5/8" shaft.

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.  

Item Details

Cast Aluminum Upper

Speedway Motors 91015482 Specifications

MFG. Part #91015482
BrandSpeedway Motors
Overall Length2.90"
Outside Diameter6.65"
Mounted Length2.65"
Shaft Diameter.63"
Bolt Hole Pattern4 on 1.75 or 4 on 2.13
Groove Count2
Belt Width.36"
Belt TypeV-Belt
Material TypeAluminum
Sold in QuantityEach
NotesMounted length is from the face of the water pump pulley mount towards the front of the engine.
Water Pump StyleShort/Long