Billet Chevy Double Groove Upper Pulley - .25 Underdriven
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What's in the Box
InfoS/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
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Water pump pulley shim kit provides proper drive belt alignment with pulleys. Kit contains two aluminum 1/16" spacer and one 1/8" spacer.
Learn more about using different water pump accessories to best fit your application by reading our tech article. SBC - Short vs Long Water Pump.
Item Details(2) 1/16" shims, (1) 1/8" shimCompare