The 'March Pirelli Car Pack' features cars as diverse as the 2012 Ultima GTR, which is one of the world's fastest accelerating automobiles, and the 1966 Ford County Squire.
Costing 560 Microsoft Points (£4.80 / $7) to download, the 'March Pirelli Car Pack' will be available from March 6.
Forza Motorsport 4's DLC is free to download for season pass holders. Costing 2,400 Microsoft Points (£20.50 / $30), the season pass represents a 30% saving when compared to buying each pack individually.
> Read our five-star review of Forza Motorsport 4
The full list of cars in the 'March Pirelli Car Pack':
Watch a trailer for the 'March Pirelli Car Pack' below: