Speedway Billet Aluminum double groove pulleys for Small Block Chevy feature a 30% 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.
- 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
Fits a 5/8" shaft.
This item is garage sale priced because it's old stock.
**NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS**
Short or Long Upper, 30% Double Groove