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S/B Chevy Cast Aluminum Reduction Pulleys

Price: $13.99 - $54.99
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Speedway Cast Aluminum double groove pulleys for Small Block Chevy feature a 20% reduction. Reduction pulleys have a smallerdiameter 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.

Available for Short style pumps ('55-'68) or Long style pumps ('69-'86). Fits a 5/8" shaft.

  • 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.
  • 910-15484
    • 5-7/16" O.D.
  • 545-64060
    • 5-3/8" O.D.
  • 910-15476
    • 6-5/8" O.D.
    • Hub Surface to 1st Groove: 2.415"
    • Center to Center of Grooves: 11/16"
  • 910-15488
    • 5-7/16" O.D.
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What is the diameter of lower pulley for long water pump...91015488

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Short Pump Double Groove Pulley
Price:
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Item #:
91015482
Item Details:
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  Show Specifications
  • 91015484
    Finish
    Polished
    Belt Type
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    Material Type
    Aluminum
    Overall Diameter
    5.375" (5 3/8")
    Overall Thickness
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  Show Specifications
  • 91015488
    Mounted Length
    2.795"
    Outside Diameter
    5.440"
    Belt Type
    V-Belt
    Material Type
    Aluminum
    Finish
    Natural
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    Notes
    Double groove, 25 percent reduction lower pulley for long pump.
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Item Details:
Pair of Matched Belts, 32" length
 
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    Sold in Quantity
    Pair
    Belt Type
    V-Belt
    Overall Length
    32.000"
    Overall Width
    0.430"
    Notes
    32" BELT
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  • 91015416
    Sold in Quantity
    Pair
    Belt Type
    V-Belt
    Overall Length
    32.500" (32 1/2")
    Overall Width
    0.375" (3/8")
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