I've been thinking of entering one of these ever since I got the .
They have different classes were regular street cars can enter, and heavily prepped cars can enter in the higher up classes.
Here's a vid of a race prepped 350Z wiping out at @ 260kph...
http://view.break.com/128169
Notice, driver walks away! Great to see he was unharmed but that car is now a complete write off!
Ben