The latest set of Forza Motorsport 3 downloadable content (DLC), inspired by the currently ongoing North American International Auto Show in Detroit, Michigan this week, is now available for punters to pick up for 400 MS Points on Xbox LIVE Marketplace.

Dubbed the ‘AutoWeek Car Show Pack,’ the DLC adds a variety of top cars debuting in real life in 2010, and some racers from 2009, such as the 2010 Chevrolet Corvette Grand Sport, 2010 Ford Shelby GT500 and 2010 Aston Martin One-77.

The full list of cars available now in the new Forza 3 DLC follows below:

• 2009 Audi RS 6
• 2010 Ford Shelby GT500
• 2009 Lotus 2-Eleven
• 2010 Aston Martin One-77
• 2010 Porsche Boxster S
• 2009 Audi R8 LMS Show Car
• 2010 Pagani Zonda R
• 2010 Saleen S5S Raptor
• 2010 BMW Motorsport M6 Coupe
• 2010 Chevrolet Corvette Grand Sport

Developers of Forza 3, Turn 10, are also offering the 2009 Lotus 2-Eleven as this month’s free car download as a ‘try before you buy’ option. Thanks a bunch!