I went from 3.36 with a 12' 7AT G37 to the 3.69 rear from a 6MT 370z. The difference was immediate and well worth the pumpkin swap. I also did a carbon PST driveshaft with the swap but the gearing was a night and day difference. The only hickup was that I lost cruise control but I never used it anyway. And yes the FD gear on any car is a torque multiplier. Torque gives accelleration , hp gives you speed.
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