Shelby Mustang fans had to wait a long time for the GT500 to return in 2007, but the all-new model was worth the wait. Developed by Carroll Shelby and SVT, Ford's Special Vehicle Team, the S197 GT500 had a 500-horsepower supercharged 5.4-liter V8 under its hood and a TREMEC six-speed manual to turn all that fury into forward motion. Of course, the GT500 also had upgraded brakes and suspension hardware to keep all four 18-inch machined aluminum wheels on the road. Someone had the willpower to res