NASCAR 07 Codes -

Old Spice Fantasy track and all cars and drivers in all four divisions:
Enter KeepCool as a first name and SmellGreat as a last name.

Wal-Mart Exclusive track and Wal-Mart Sponsored cars:
Enter Walmart as a first name and EveryDay as a last name. This will unlock the "Wal-Mart" named race track in Race Now mode. It is a 2-mile Road Course based in downtown Chicago. This code also unlocks Wal-Mart Sponsored cars for all racing series the "Wal-Mart" sponsor for create-a-car mode.

All Chase plates:
Enter ItsAll as a first name and ForMe as a last name.

10 million fans:
Enter AllBow as a first name and ToMe as a last name.

Level 10 Prestige:
Enter Outta as a first name and MyWay as a last name.

Full team Prestige:
Enter MoMoney as a first name and BlingBling as a last name.

$10 million:
Enter GiveMe as a first name and More as a last name.

To get a large amount of money easily, enter GiveMe More as a name, then choose to edit that name to return to the name entry screen. The name will still be there. Just accept it again to add another $10 million to your total.

No collision mode:
Enter Walmart as a first name and NoCollision as a last name. This mode can be turned on or off in the Damage selection in Race Now mode and will appear as "Wal-Mart No Collision Mode". When this mode is enabled your car will be able to drive through all other cars on the track (in a sense "Ghost mode"), resulting in no damage to your car. However, as a result of driving through other cars your Rival meter will increase, as if you hit them under normal racing modes.