LE-2001 truck
At the mode selection screen, press Y, X, Right, Left, Right, Left, Down(2), Up(2). Alternately, successfully complete expert mode in first place with the Coyote.

T4 fighter jet
At the mode selection screen, press Left, Right, Down, X(4). Alternately, achieve 100% on the level checker when building your car.

Additional colors
At the mode selection screen, press Down, Left, Up, Right, X, Y, L, R to unlock a fourth color set. Alternately, successfully complete expert mode.

Random weather in time attack mode
At the mode selection screen, press R, X(7), Y(7).

Super expert mode
At the mode selection screen, press Left(2), Right(2), Left, Right, X, Y(8). Alternately, successfully complete expert mode on the championship difficulty with the Beelzebub Buggy.

Beelzebub Buggy
Successfully complete expert mode in first place.