This Stage 1 tuning file for the Infiniti M37 3.8L (model year 2012) on a Hitachi/Nissan platform boosts throttle sensitivity, improves low-end and midrange torque, and enhances shift feel on automatic variants. Built around software 11MF1A00000 and checksum-corrected, this calibration maintains OEM drivability while unlocking additional performance for off-road or track use.