Small Block Chevy Cast Alum. Short Pump Double Groove Lower Pulley
Chevy Small Block V8, 5-7/16" Overall Diameter, 1.44" Overall Thickness, 2 Groove Count
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
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
- 5-7/16" diameter
Note: The lower crank pulleys are manufactured thicker than normal stock pulleys. This requires longer 3/8" bolts to be purchased separately. Allen head type bolts recommended.
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 DetailsCast Aluminum Lower
More Like This
1969-1985 Small Block Chevy Aluminum Double Lower Pulley, Long Pump
Small Block Chevy Aluminum Single Lower Pulley, Short Pump
Small Block Chevy Cast Alum. Long Pump Double Groove Lower Pulley
Small Block Chevy Aluminum Double Lower Pulley, Short Pump
Small Block Chevy Aluminum Triple Lower Pulley, Short Pump
1969-1985 Small Block Chevy Aluminum Single Lower Pulley, Long Pump
1969-1985 Small Block Chevy Aluminum Triple Lower Pulley, Long Pump
1969-85 Small Block Chevy Double Groove Lower Pulley, Long Water Pump
1955-68 Small Block Chevy Double Groove Lower Pulley, Short Water Pump
1969-85 Small Block Chevy Single Groove Lower Pulley, Long Water Pump
Q & A
In this episode, Project Chevelle takes a big step in its muscle car transformation. It's out with the little old 307 and to the dyno with our new 383 from BluePrint Engines!