Extra Car
When playing in arcade mode choose any car. Then play all tracks in order. You must make a record and at the last track you will see the staff names. Then you'll get a new car named Daytona.
Hidden Trick
Do you know that tricky turn at the end of Dinosaur Canyon? Well, that large wall is actually hiding a hidden road which looks like a path to victory. It isn't. It's actually hiding a dead end road with a banner that says:Congratulations, you just lost your sponsors.
If you don't believe me just turn backwards at the end of the pit stop and drive into humiliation!