Press Up, Down, Left, Right at the main menu to enter the code entry screen. Then, enter one of the following:
FIXITUP - Free car repair
GORETRO - Pac Man Vinyl
GOTPOPO - Police Car
IGOTGST - 1999 Mitsubishi Eclipse GS-T
LETMEGO - The first three times you are pulled over in street mode, you will be released with a warning.
MYTCGTS - 2004 Toyota Celica GT-S Action Package
RENESIS - Mazda RX-8
SICKGDB - Subaru Impreza Sti
SICKJZA - 1996 Supra RZ
Go play in Arcade mode and choose Iron Man. Finish in first place in all races and you will unlock the following.
Subaru STi - Finish first in all 3 levels of the Street Revolution Crew Meet in street mode
Nissan Skyline V-Spec II Nur - Finish in first place in the Los Angeles checkpoint mission in arcade mode.
Mitsubishi Lancer Evolution VII GSR Finish in first place in the Los Angeles checkpoint mission in arcade mode.
Mazda RX-7 Bathurst - Have all first place finishes in the Los Angeles Iron Man challenge in arcade mode.
Mazda RX-8 Mazdaspeed - Have all first place finishes in the Miami Iron Man challenge in arcade mode.
Toyota Sprinter Trueno - Have all first place finishes in the Philadelphia Iron Man challenge in arcade mode.
Mitsubishi Evo VII GSR - Win the Los Angeles checkpoint mission in arcade mode
Get away from police:
To get away from any cop during a pursuit, drive into the showroom parking lot. Park in the corner where the wall is located. The cops will circle but not find you. Wait until your meter reaches "Evaded" and you will be all clear.
When you place wagers before each race, the amount of each wager stays the same throughout all three races, no matter what the wager amount says between the races. For example, if the beginning wager is $2,000 then it will remain that way throughout the entire series for that racer.
Go to the desert sanctioned race and do level one. Select the last wager on the screen, then accept it, and race. Do this for every race and you will get at least $12,000 easily. Keep repeating this to build up a large amount of money.
Get a car that at least has 330 hp (after all the upgrades), then buy the Venom 2000 nitrous kit. Enter the Boulevard Sprint in the street challenge menu. Keep entering this race repeatedly, but make sure you always have at least a half tank of nitrous when you start. If you go into a crew meet, keep going on the last wager. After the second time, the wager will double. Keep doing this and your cash will double.
Although in real life, body kits were originally designed for aero-dynamics (to reduce wind resistance, thus making your car move faster), this is not true in the game. The body kits weigh down the car more, thus reducing your top speed. This can be as little as 10 mph to as much as a 25 mph loss, which can obviously be the difference between walking away with someone’s ride or losing yours. Do not put body kits on your cars. They do not add to respect, will slow you down, and makes your car cost more to repair.
Go to the shop and install the lower end model of NOS than what you already have. Then, re-install you original NOS tank and exit. Except for the cost (which should be $0), and you should have a full tank of NOS for free.