The 435 hp of the standard 2015 Mustang GT is nothing to scoff at, but if you're looking to run with the Corvettes and Hellcats of the world, it's simply not enough. Which is why they build the 2015 Hennessey Supercharged Mustang. Limited to just 500 units, this upgraded pony offers 717hp thanks to a supercharger upgrade, and also makes sure you can handle all that power, with lightweight 20-inch wheels wrapped in Michelin Pilot Super Sport 2 rubber, 15.1-inch Brembo brakes, and a carbon fiber body kit that adds downforce for improved grip and handling.