Press Up, Down, Left, Right at the main menu to enter the code entry screen. Then, enter IGOTGST as a code.
Infinate Nos
Once you have Nos you don't have to buy more everytime you run out. Just go to street mode and rack up some points and your Nos fills back up. Works everytime just don't get busted by the cops for speeding.
Mazda RX-7 Bathurst
Finish in first place in every race in the Los Angeles Iron Man challenge in arcade mode.
Mazda Rx-8 In Arcade Mode
Press Up, Down, Left, Right at the main menu to enter the code entry screen. Then, enter RENESIS as a code.
Mazda RX-8 Mazdaspeed
Finish in first place in every race in the Philadelphia Iron Man challenge in arcade mode.
Mitsubishi Evo VII GSR
Beat the Los Angeles checkpoint mission in arcade mode.
Nissan Skyline V-Spec II Nur
Beat the three Nitro X-treme Crew Meet series in street mode.
Police Warning Instead Of Ticket
Press Up, Down, Left, Right at the main menu to enter the code entry screen. Then, enter LETMEGO as a code. The first three times you are pulled over in street mode, you will be released with a warning.
Sprinter Trueno
Have all first place finishes in the Miami Iron Man challenge in arcade mode.
Sti
Win the Street Revolution Crew Meet in street mode.
Toyota Trueno Apex
Finish first place in in the Philadelphia Iron Man challenge in arcade mode.
Various Codes
To enter these codes press UP, DOWN, LEFT, RIGHT at the main menu. This will take you to a cheat console where you can enter these codes:
Police car: GOTPOPO
1996 Toyota Supra RZ: SICKJZA
2004 Toyota Celica GT-S Action Package: MYTCGTS
Free car repair: FIXITUP
Pac-Man vinyl: GORETRO