Hold L1 + L2 + R1 + R2 while selecting a track until headlights appear in
front of the car. A new symbol will appear on the track to confirm correct
Pause game play in single player mode. Enter the "Sound" option, highlight
the "FX Volume" selection, and press L1 + L2. Then press Triangle to exit
Select multi-player mode. Press X + Square + Triangle + Circle at the track
selection screen. An engine will be displayed at the bottom of the screen to
confirm correct code entry.
Select multi-player mode and select a track and car. Press Circle + Left
when the countdown that marks the start of the race begins.
Choose a track and press Select. Quickly hold X + Square as the cars enter
the tunnel. While continuing to hold those buttons, press Left or Right. The
cars will turn around and enter the tunnel in reverse to confirm correct
code entry. Alternatively, press L2 + R2 + X + Down at the track selection
screen. An arrow will appear to confirm correct code entry.
Upside down tracks:
Press L1 + R1 + X + Down at the track selection screen. An arrow will appear
at the bottom of the screen to confirm correct code entry.