Need for Speed: Underground Cheats

Samantha's car
Keep getting style points until you get all the vinyls, then fill up the next meter.

Kurt's Killa Ride
Use a Stock Mazda RX-7 and keep trying until you win.

Easy drift points
Simply stay behind a car and watch the points rack up.

Turn off the stability control by going into options and selecting "Car". This will make the car drift easier.

Easy wins
If you are having trouble winning circuit, sprint, or lap knockout races, take off all of your engine performance mods. Note: This works for every car, is most useful for the Nissan Skyline. You do not need to take off the handling mods.

Easier drag wins
To get to higher gears quicker in drag races, tap L repeatedly as needed to increase the RPM to the appropriate level to switch the gear. This also lessens the full force of the nitrous to lower the chance of burning the engine out.

Easy style points
After you unlock the oval drift track, go into "Quick Race" and choose that track. Then, race around it using the handbrake to powerslide into the corners. Depending on how good you are, you will unlock rewards every time you fill your meter, which does not take too long.