The North American International Auto Show kicks off this week, as car manufacturers, professional drivers, and fans from around the world flock to Detroit, Michigan to see what?s revving up in the automotive industry this year and beyond. To mark one of the biggest auto shows in the world, Turn 10 and AutoWeek are partnering to bring some of the year?s best cars to life in ?Forza Motorsport 3? with the ?AutoWeek Car Show Pack.?

Available starting today for 400 Microsoft Points on Xbox LIVE Marketplace, the new downloadable car pack raises the curtain on some of the most exciting new cars for 2010, and adds several elite 2009 racers to the ever-growing ?Forza Motorsport 3? car roster, including the 2010 Chevrolet Corvette Grand Sport, 2010 Ford Shelby GT500 and 2010 Aston Martin One-77.

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.

Now available on Xbox LIVE Marketplace, the ?AutoWeek Car Show Pack? gives fans 10 great reasons to continue racing, drifting, tuning, and painting in the new year:

1. 2009 Audi RS 6

2. 2010 Ford Shelby GT500

3. 2009 Lotus 2-Eleven

4. 2010 Aston Martin One-77

5. 2010 Porsche Boxster S

6. 2009 Audi R8 LMS Show Car

7. 2010 Pagani Zonda R

8. 2010 Saleen S5S Raptor

9. 2010 BMW Motorsport M6 Coupe

10. 2010 Chevrolet Corvette Grand Sport

For fans who like to try before they buy, Turn 10 is offering the 2009 Lotus 2-Eleven as this month?s free car download, so strap in and take the ?AutoWeek Car Show Pack? for a test spin!