Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Billet Chevy Double Groove Upper Pulley - .25 Underdriven

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Billet Chevy Double Groove Upper Pulley - .25 Underdriven

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Q & A

What's in the Box

S/B Chevy double groove pulleys. 25% reduction upper pulley. For long or short water pumps. 5/8" shaft.


  • High strength billet aluminum construction
  • Superior belt retention with extra-deep grooves
  • 30% reduction slows accessories down for less drag
  • Adds top-end horsepower
  • Reduces water pump impeller speed below cavitation threshold
  • Improved high-RPM cooling capabilities

Item Details

Short or Long Upper, 25% Double Groove

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