Wave the Flag:
At the title screen hold R1, R2, L1, and L2 and move the flag with the d-pad
and the buttons.
Beat the Time Trial Bonus Track to get the black car.
Beat the arcade game at the loading screen and you will get a whole new selection
Right after the race has started, turn around and drive straight into the brick
wall. There will be a sign on the top of your screen that says wrong way but
ignore it, and keep driving straight into the wall. Then it will take you into
the first tunnel except it will be a mirror version of the entire track.
Thanks to Revolution readers Austin Carter, Nick Altieri, Bill Shirer, Ryan,
and Steve Read!