Mustang GT mods

The best HP mod for a mustang is a supercharger kit.

Removing the stock airbox and, throttle body and replacing it with A good cold air intake and aftermarket throttle body is good for a good ammount of horsepower and torque. You will need to buy an aftermarket handheld programmer to make it work. But that unlocks more power too. I prefer the corsa extreme cat back exhaust with x pipe.