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Crank Pulleys by Craven Speed are lightened to cut rotating mass. All Craven Pulleys are precision CNC-machined to +/- 0.001" to provide better-than-factory balancing and minimize excess noise.
Stock size pulleys are the perfect compromise that allow you to use the existing serpentine belt from your car without under-powering your car's electronics.
Compare the 7lbs. weight of the Cooper S model crank pulley or 3lbs. on the Cooper to a mere .875 lb. on this Craven lightened pulley.
Add 20+ horsepower(and improved mileage!) with this pulley in combination with the Craven Speed 15% Reduction Supercharger pulley.
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In Stock!
