Turbo mode option:
Hold Circle and press Up, Left, Down, Right at the options screen. A new option that increases the game's frame rate will appear at the bottom of the screen.

Faster settings:
Enter the car setup screen and adjust the tire pressure to the maximum, wedge to the minimum, rear spoiler to the minimum, and gear ratios to the maximum.

Shoot paintballs:
Pause game play and display the race statistics screen from the options menu. Hold L1+ R1 + L2 + R2 or press that combination of buttons several times. The sound of an engine will confirm correct code entry. Resume game play and press Triangle to shoot at the other cars.

Machine gun:
Pause game play as soon as the green flag drops and display the race statistics screen from the options menu. Hold L1+ R1 + L2 + R2 + Triangle or press that combination of buttons several times. The sound of an engine will confirm correct code entry. Resume game play and press Square to shoot at the other cars.

Pinnacle Trading Cards car:
Select exhibition mode. Highlight Bobby Labonte's car on the car selection screen, then hold X and press Up, Down.

EA Sports car:
Select exhibition mode. Highlight Kenny Wallace's car on the car selection screen, then hold X and press Up, Down.