i'm not sure if there is a difference between manual and auto. I just put it out there as for auto it will work for sure. what sprint booster does is it takes the lag/delay when you step on the accelerator pedal. it eliminates the hesitation so you can mash down on the accelerator pedal with no lag or delay. please see this link as a fellow 370z forum member reviewed it:
Sprint Booster for 370Z