This tune is needed if you have an automatic transmission. The shifts from gear to gear are firm and quick. From the factory the Mustang V6 was very sluggish and didn't feel like a car with 305hp. After uploading the MPT tune the car was completely different and feels like a sports car. My 0-60 was 6.6 seconds stock, after the tune my 0-60 dropped to about 5.8 seconds. The tune also allows you to select shift pressure which is healthier for the transmission and also chirps tires during shifts.