The Shelby GT500 comes as a coupe or convertible. The GT500 is powered by a 5.4-liter supercharged V8 developing 500 horsepower. Because of its high gas consumption, it incurs a gas-guzzler tax. Safety features on the GT500 include dual-stage front-impact airbags and three-point belts for all seats. It stands out with a unique front grille and bumper fascia, providing both a functionally larger and unimpeded air intake, while reducing air flow under the body. A unique engine hood with dual air-extraction slits is domed to clear the larger, 5.4-liter engine.The Ford Shelby GT500 is a new model for 2007.