This is a custom ROAD/RACE CNC machined crank pulley. It is made of aircraft grade aluminum and weighs just 1 lb. Stainless steel sleeve around pulley hub assures long life. Stock pulley weighs more than 4 lbs. and robs h.p. from the engine just to spin it. Just like a light flywheel, throttle response will be greatly improved! Installs in minutes and uses original belts. Designed Specifically for the 3.8L Genesis motor. Will Allow the motor to get into its peak power range sooner.works on BOTH MANUAL AND AUTO TRANSMISSION
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