Microsoft and Turn 10 have released the Exotic Cars Pack for Forza Motorsport 3.
Take the SSC Ultimate Aero - the fastest car allowed on the road, holding a top-speed record of 257mph. Or there's the Nurburgring lap-time record-holder the Radical SR8 LM. No road car does the famous course better, apparently.
Those two plus eight others are all parked tightly into the Exotic Car Pack. This costs 400 MSP (Ł3.40/€4.80) and can be queued for download from the Xbox.com website.
Forza Motorsport 3 is brilliant, should you not yet have bothered. Check out Eurogamer's review for a full analysis.