There's a workaround for the 06 models that turns trac and other stuff off. On the 07 models you press and hold the trac off button for a few seconds and it will stay off until you push it again or restart the car. Either way, you can do donuts, drift, and burn tires to your heart's content. I've done it in the 06 and have been told by 07 owners that it works just fine.