To unlock the Steel Wheels Car, head to the In-Game Cheats Menu, where you can insert, "Sponser Codes". Then, insert the following code.

Vatoloco said:

To unlock the Steel Wheels Car, head to the In-Game Cheats Menu, where you can insert, "Sponser Codes". Then, insert the following code.

I can't find where to put these codes

Caleb369 said: I just thought of a way around it..
Delete all updates/patches for the game. Then disconnect yourself from the Internet (Turn off in PS3 settings.)
Enter your code, then reconnect and reinstall patches.
Haven't tested, but it plays out logically.