Are you looking to get more low end grunt off the line and lower ET’s at the same time? Then look no further than installing a set of steeper gears in your car. This upgrade alone makes any car feel substantially more powerful – helping launch the car off the line and get up to speed quicker. Speedometer recalibration via a handheld tuning device is required for an accurate speedometer reading; so many opt for a performance tune at this time. This manual V-6 Mustang is getting upgraded to 3.73’s; the recommended ratio for a 5 speed car.