It is certainly one of the most powerful Mustangs to date. This is the new 2007 Ford Shelby GT500 muscle car. To give you a small preview of what this sports car has to offer, let me sum it up with a few numbers and words: 500 horsepower and 5.4-liter supercharged V-8. Did that got your attention? It should have, for someone who likes sports cars with brute strength, those numbers will get them at the edge of their seats. What can I say, this muscle car´s power is classic Shelby. The 5.4-liter, 32-valve V-8 engine has been the result of Ford´s years of tinkering with modular engines. The results are nothing less but remarkable.