-Unlock all circuit tracks:
At the main menu, press Down, R, R, R, X, X, X, Z. 

-Unlock all drag tracks:
At the main menu, press Right, Z, Left, R, Z, L, Y, X. 

-Unlock all drift tracks:
At the main menu, press Left, left, Left, left, Right, X, R, Y. 

-Unlock all sprint tracks:
At the main menu, press Up, X, X, X, R, Down, Down, Down. 

-Drift physics:
At the main menu, press R, Up, Up, Up, Down, Down, Down, L. 

-Easy Drag Races 
Having a hard time completing a drag race? Strip your car of every 
performance upgrade except handling and brakes. Your opponents 
will automatically do the same thing. This makes it easier to make 
a perfect shift everytime. This will work in all races except the 
ones that say you have to have a fast car.

-Extra Style Points in Drift 
During any Drift competition, pause t he game at the moment you 
impact a wall. Unpause the game and you'll be rewarded with free 
style points. 

-Have both the Katana and Dual GT Spoiler 
Play through the game normally, and once you beat Samantha's Big 
Tease (#77), pick the Katana Unique Spoiler. Now, to get the Dual 
GT, trade in your car for a Peugot 206. Then, trade your car back 
to what you had and now your car has Dual GT as the spoiler. To 
switch back for the Katana Spoiler, just go to spoilers and scroll 
all the way to the end, and there's the Katana spoiler! Once you 
do this, you now will have both Katana and Dual GT in the 
customize ride from the main menu.