Enable Taxi:
Win the Gold with the street rocket in the Amateur championship.

Enable Pick-up:
Win the Gold with the taxi in the Pro championship

Enable Ambulance:
Win the Gold with the pick-up in the Legend championship.

Enable Baja Buggy:
Beat the Destruction Junction track with the best time in Time Trial mode using the Street Rocket car.

Enable Rag Top:
Beat the Alpine Ridge track with the best time in Time Trial mode using the Baja Buggy car.

Enable Blue Demon:
Beat the Seascape Sprint track with the best time in Time Trial mode using the Rag Top car.

Enable Hatchback:
Beat the Terminal Impact track with the best time in Time Trial mode using the Rag Top car.

Enable Low Rider:
Beat the Metro Challenge track with the best time in Time Trial mode using the Rag Top car.

Enable Woody Wagon:
Beat the Bayou Run track with the best time in Time Trial mode using the Rag Top car.

Enable Hot Rod:
Beat the Sunset Canyon track with the best time in Time Trial mode using the Rag Top car.

Enable Police Car:
Beat the Midnight Rumble track with the best time in Time Trial mode using the Hot Rod car.

GameShark Codes

All Difficulty Levels       81097A160003
Baja Buggy                  80097A180001
Low Rider                   80097A190001
Woody Wagon                 80097A1A0001
Pickup                      80097A1B0001
Taxi Cab                    80097A1C0001
Blue Demon                  80097A1D0001
Rag Top                     80097A1E0001
Hot Rod                     80097A1F0001
Ambulance                   80097A200001
Watchback                   80097A210001
Street Rocket               80097A220001
Police Car                  80097A230001
All Cars & Tracks           500006020000
                            81097A180101
Tracks
Metro Challange             80095CCC0001
Seascape                    80095CCD00001
Boyou                       80095CCE0001
Terminal Impact             80095CCF0001
Destuction Junction         80095CD00001
Sunset Canyon               80095CD10001
Apline Ridge                80095CD20001
Midnyte Rumble              80095CD30001
 

Thanks to Revolution readers Lukasz Gaska, Kanine, Matt Magiera, Joe Benoit, Dwayne Johnson, Josh Edwards, Kris Conner, and jackal_50!