Perfection is subjective. So go ahead. Use this free app to redefine your idea of the ultimate Mustang. From rims to hoods to paint color and more, we’re giving you complete control in dreaming up your ultimate Mustang. Once you’re done, you can enter it into a battle with someone else’s car, including your Facebook friends’. Even pick a nemesis. The more you win, the more you move up in status in the Mustang Customizer.