The first piece of downloadable content for Race Pro has just been released. For 800 Microsoft Points, players can get four new cars and and a new track in a package which weighs in at 1.5GB.

The pack includes production and race versions of the Dodge Challenger, Dodge Charger, Cadillac CTS-V and Chevrolet Camaro alongside the Imola circuit. There are also two extra variants of the Road America track included.

Race Pro Pack 1 [Xbox Live Marketplace]