Crash Cheat Codes for XBox

Winning
If your health is low (flashing red) and you are winning with a good lead with little time left, start going in circles and allow the timer to run out.

More Damage
If you are doing anything offensive, use nitro and slam into enemies whenever possible for a boost in points immediately at the beginning. If a car is smoking and missing a door, hood, or something else, either nitro into it or hit your handbrake. Press the Analog-stick Left or Right, and slide into your enemy.