Continuing to support its Xbox 360-exclusive racer, developer Turn 10 today brought ten more cars into Forza Motosport 3 with the downloadable "AutoWeek Car Show Pack."

Of the new cars, one--the 2009 Lotus 2-Eleven--is available as a free download, while the remaining nine are only available after purchasing the 400 MS Point / $5 add-on.

A breakdown of the new cars, as well as some descriptions, follow below:

AutoWeek Car Show Pack
• 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

Coveted by car enthusiasts for years, the Chevrolet Corvette Grand Sport was first conceived in 1963 by legendary Chevrolet engineer Zora Arkus-Duntov. The 2010 model brings classic style and track-proven performance to the table with an updated 6.2-liter LS3-based V8 engine rated at 430 horsepower, wide-body styling, and an updated suspension setup. The 2010 Ford Shelby GT500 is a must-have in any "Forza" fan's garage. Featuring a 5.4-liter supercharged V8 that pumps out 540 horsepower, the Shelby GT500 runs on an updated chassis with new suspension and aerodynamic improvements. Additionally, the 2010 Aston Martin One-77 combines modern technology and design with supreme craftsmanship for the ultimate expression of Aston Martin exclusivity. The 7.3-liter V12 pushes the car to well above 200 MPH, which may make it the fastest car in your "Forza Motorsport 3" stable.