The Limited Collector’s Edition of Forza 4 will ship with an art book (with content written by Top Gear magazine staff), metal case and a range of extra cars, including the 2012 BMW M5 and classic American muscle cars. More info at the link. [Jalopnik]
https://jalopnik.com/the-2012-bmw-m5-looks-epic-in-forza-4-5815786