> Highlight the Alfa Romeo, Opel, or Mercedes.  Press Up or Down for alternate colors and decals on those cars.

> Press Start while racing to pause the game.  Then, press X+Y+Z simultaneously to get the clean pause screen.

> In the Saturn Side just finish the Urban Circuit (bonus race) of the Championship mode once.

> In the Saturn Side select Options and press X, Y, Z, X, Y, Z, Y, X.  You'll hear an engine rev to confirm the code.  Highlight  Global Net Event from the Saturn Side menu and enter these codes to race the events:

1st Event - X+Start
2nd Event - Y+Start
3rd Event - Z+Start

> In the Arcade Side just finish the Championship mode once.

> In the Saturn Side just finish 1st in the Exhibition Race mode once to get this sweet car.  This also opens up the AI modes.

Note: You need the Sega Arcade Racer (steering wheel) for this code to work.
> Plug an Arcade Racer into port two.  In Arcade or Saturn Side go to the Options Screen.  Select Key Configuration and press X+Y+Z+Start simultaneously on the Arcade Racer (timing is critical).  You'll hear an engine rev to confirm the code.  Here's what you'll unlock: 

Arcade Side

• Expert Mode
• Grand Prix Mode

Saturn Side

• Exhibition Race Mode
• Vs. AI Car Mode
• Urban Circuit
• Boom Town Circuit (in Exhibition Race Mode)
• Celica GT-Four (highlight the Supra and press Z)
• Lancia Delta HF Integrale (highlight the Alfa Romeo and press Z)
• Sega Racing Proto (highlight any car and press X)