Ultra Light flywheels are CNC-machined from lightweight 6061-T6 billet aluminum. Tolerances are held to within .001". These flywheels can be used with any stock or aftermarket clutch setup. UR friction insert (heat shield) is a specially treated alloy steel with a surface that is much stronger than the stock flywheel. All inserts are CNC-machined instead of being quickly ground like most aftermarket units. All ring gears are heated before they are placed on the flywheel and then cooled to shrink them in place. In addition they are bolted to ensure the ring gear will never slip or come off the flywheel under any circumstances. flywheel weights are chosen very carefully. They are the perfect balance of strength and light weight. Because of their light weight, energy normally used to turn the heavy stock steel flywheel is now used to turn your drive wheels! In addition, the reduced mass allows the engine to rev faster and get you into your power band more quickly. For turbo cars this is an even greater advantage, allowing the turbos to kick in faster since the engine is revving more quickly! UR flywheels are the perfect choice for street use, drag racing, autocross, and road race events. Horsepower gains for aluminum flywheels can average from 10 to 30 horsepower over stock levels at the drive wheels. Weighs 11 Lbs
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