Super Speed mode:
Complete championship mode once. The game will remove mirrors in the cockpit view and twenty cars to increase the frame rate to 60 fps.

Bonus pace cars:
Complete championship mode four times to unlock the Acura NSX, BMW M3, Toyota Celica, and Toyota T100 pace cars.

Bonus camera angle:
Complete championship mode once and finish in first place in each race to unlock a far top view camera angle that resembles the game Micro Machines.

Drive as S. Hattori:
Complete championship mode once to unlock a bonus Japanese driver that is not ranked in the CART-Season or with a Team.

Rainy weather:
Hold L + R + Down immediately after selecting a track in arcade mode. Continue to hold the buttons until the track completes loading.

Weather never changes:
Hold L + R + Up immediately after selecting a track in arcade mode. Continue to hold the buttons until the track completes loading.