Ford’s 5.0L V8-powered Mustang GT may be an icon, but Hennessey’s 800 HP supercharged performance upgrade delivers this pony car to legendary status. Sporting a bevy of options including new wheels, tires, brakes, and carbon fiber front splitter, side skirts, and rear spoiler, this stunning orange example headed out to the Pennzoil Proving Ground to show its owner what it could do.