The Mustang is 100% streeet legal except i put a slip on pipe over the cats until i needs inspected. Other then that it is all legal. I just got a Nitrus Works kit for it to give me an extra 350 horse. Im hoping to have 950 at the wheels when i put this kit on. I do drive it around a little just for show. Mostly just to work and back.it really dosnt race on the street well at all. It dose nothing but spin the tires. Even normal driving it turns sideways on me going around corners if i tap the throttle.