Changes to the 2007 Dodge Caliber SRT-4 on the outside help to facilitate the power on the inside, such as air ducts and a functional hood scoop. The front fascia has also been changed in order to redirect the flow of air in the front of the vehicle. A larger spoiler at the rear also lends aerodynamic benefit, and the Caliber SRT-4 rides on muscular 19-inch alloy wheels. Four exterior colors are available: Brilliant Black, Sunburst Orange, Bright Silver and Inferno Red.