Shift 2 Unleased has released a downloadable pack called Legends that features brand new cars and tracks to play on. Featuring the 1960's and 1970's, the pack includes 13 of the time periods most recognizable cars, such as the Porsche 911 Carrera RSR 3.0. It also has five brand new tracks from that period to test your brand new wheels on.
For PlayStation Network users the pack is $10, for Xbox Live users it's 800 Microsoft Points.