M Factory 5.375 Final Drive - Corolla AE86M Factory Final Drive for Corolla AE86 5. 375 Final Drive The MFactory final drive gears (crownwheel & pinion kit) are cut from high quality fully Carburized Forged Nickel Chromoly Steel while also benefiting from our proprietary heat treatment process. As a result, we are proud to offer enthusiasts the best final drive gears on the market today. By changing your final gear ratios, you can experience a dramatic increase in acceleration, giving you on
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