need for speed carbon help!?

Question

how do you unlock-

toyota mr2
lotus euoropa
porsche 911 gt3 rs
porsche 911 carrera

Ive played theese cars in the challenge series, so i know you can unlock them. But ive unlocked everything exept for some reward cards!

Answer 1

Try http://www.gamefaqs.com. There are a lot of Q/A questions and guides, and even people you can email to ask for professional help from people who beat the game!

Good Luck,
OrbisNonSufficit