Xbox 360 owners that have Need For Speed: Carbon received the ability to unlock three additional cars today. Apparently, this fills EA's weekly quota of selling unlockable game content up-front for a price. The vehicles are:

2004 Mercedes SLR Mclaren
2004 Porsche Carrera GT
2004 Lamborghini Gallardo

All three cars cost 80 pts and are available in all Xbox Live regions.