-Cheat Codes 
On the main start menu, enter the following:

-Unlock All Drag Tracks 
Right, Square, Left, R1, Square, L1, L2, R2 

-Unlock All Drift Tracks 
Left, Left, Left, Left, Right, R2, R1, L2 

-Unlock All Circuit Tracks
Down, R1, R1, R1, R2, R2, R2, Square 

-Unlock All Sprint Tracks
Up, R2, R2, R2, R1, Down, Down, Down 

-Unlimited Nitro
X, Circle, Triangle, Triangle, X, X, Circle

-Drift physics: 
R1, Up, Up, Up, Down, Down, Down, L1. 

-Level 1 Performance Parts: 
R2, R2, R1, R1, Left, Right, Left, Right. 

-Level 2 Performance Parts: 
R1, R1, R1, R1, R2, R2, Left, Right. 

-Level 2 Visual Parts: 
Down, Left, Up, Down, R1, R2, R2, Square. 

-Unlock Acura Integra: 
R2, R2, R1, R2, L2, L1, Down, Up. 

-Unlock Acura RSX: 
R1, R2, Down, Left, Up, Right, Left, Right. 

-Unlock Ford Focus:
Left, Right, Up, R1, R2, R1, R2, Up. 

-Unlock Honda S2000: 
Up, Up, Down, Down, Up, Left, Square, R2. 

-Unlock Hyundai Tiburon: 
Left, Right, Left, Right, Up, Down, Up, Down. 

-Unlock Lost Prophets car: 
Up, Up, Up, Right, Down, Down, Up, Right. 

-Unlock Mitsubishi Lancer: 
Left, Left, Left, R1, R1, R2, R2, L2. 

-Unlock Mystikal car: 
Up, Right, Up, Up, Down, Right, Up, Right. 

-Unlock Nissan Nismo: 
Up, Down, Up, Left, Down, Down, Up, Right. 

-Unlock Nissan 240SX: 
Up, Down, Left, Right, Square, R1, L2, R1. 

-Unlock Nissan 350Z: 
Right, Right, Down, Up, Square, L1, R1, L2. 

-Unlock Nissan Sentra: 
Right, Right, Right, L2, L2, R2, R2, Up. 

-Unlock Nissan Skyline: 
Down, Down, L1, L2, L1, L2, L1, Down. 

-Unlock Petey Pablo car: 
Up, Up, Up, Down, Up, Up, Right. 

-Unlock Rob Zombie car: 
Up, Left, Up, Up, Down, Left, Up, Right. 

-Unlock Subaru Impreza: 
Up, Down, Down, L2, Up, L2, Down. 

-Unlock Toyota Supra: 
R1, R1,R2, R1, R2, R1, L2, L1.