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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.
The Craven Speed 2% Overdrive pulley will drive your supercharger faster AND add additional torque by reducing the fly-wheel type weight of the stock crank pulley.
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!
