Unlimited shields and turbo's
At the main menu, press L1+R1, L2+R2, L1+L2, R1+R2. Start your game, but you will also get unlimited turbos once weapons and boost are activated after start. The code has to be re-entered for each race.
Double prize money
At the main menu, press L1, L2, R2, R1, R1+R2, L2+L1.
Infinite ammo
At the main menu, press L2, R2, L1, R1, L2+R2, L1+R1.
Extreme Lap Challenge
At the main menu, press L1, L2, L1, R1, L1, R2, L1+R1, L2+R2
All Tracks
At the main menu, press L1, L1, L2, L2, R2, R2, R1, R1, L1+R1+L2+R2
Win Next Race
At the main menu, press L1+R1+L2+R2, L2+R2, R1+R2, L1+R1+L2+R2
StarCom team
At the team selection screen, press L2, R2, L1, R1, L2 + R2, L1 + R1.
Quick start
To get a jump start when you begin a race, hold Forward during the countdown without pressing Gas. As soon as "Go" appears, hit the accelerator.