Achieve the ultimate in acceleration with the MFactory Final Drive Gears. By changing your final gear ratios, you can experience a dramatic increase in acceleration, giving you on average, a 10-15% increase in torque throughout the entire rev-range over the OEM Final Drive. Combine this with the close ratio gear set and .861 6th gear for the best N/A upgrade available and turn your 86/BRZ into the sports car it wants to be.