M Factory - 4.928 Final Drive - Honda - CR-Z ZF1Specifications: Manufacturer: M Factory Ratio: 4. 928 Final drive gears are cut from high quality fully carburized forged nickel chromoly steel while also benefitting from a proprietary heat treatment process. As a result we are proud to offer enthusiasts the best final drive gears on the market today. By changing you final drive gear ratios, you can experience a dramatic increase in acceleration, giving you on average a 10 15% increase in torque
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