More Damage
Enter "DAMAGE" as a code.
More Realistic Physics
Enter "SIM" as a code.
Get Credits
Enter "CREDITS" as a code.
Get Blow Off valve
Enter "MARKSKAIFE" as a code.
All Cars
At the bonus screen under the options menu, enter "XKIMCF".
All Tracks
At the bonus screen under the options menu, enter "QTRIKX" or "TMYTKO".
Pro Race Driver Tracks
At the bonus screen under the options menu, enter "LQJFFA".