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800.979.0122

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Aluminum Drive Mandrel, Small Block Chevy, 3.250 Inch

Aluminum Drive Mandrel, Small Block Chevy, 3.250 Inch

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These aluminum drive mandrels for small block Chevys work with our belt drive systems and are available in various lengths. Length is measured as the working length where the pulleys and spacers are positive.

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Lower Crankshaft Pulley, Small Block Chevy Short Pump, Mandrel Drive
(Part #91015483)
                        

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.

 

  • Center register machined to work with 1" OD lower drive mandrels    
  • Lightweight cast aluminum 
  • Superior belt retention with extra-deep grooves 
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  • Adds top-end horsepower  
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  • Improved high-RPM cooling capabilities 
  • 5-7/16" diameter 
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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.   

 

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Item Details

for 220-38120
Brinn 38016 Gilmer Mandrel Drive Pulley, 16 Tooth
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Gilmer or cog belts are the tried and true belts used to drive dry sump oil pumps and other engine accessories.