Mario Andretti Racing Cheats (Genesis)

To start the game with $403,000 (and 600 points) enter this code at the password screen:
CS2Q-FEBA-EDAV-BUPH-TFAA

For (tricked-out) stock cars enter this code at the password screen: KVUE WLD2 WQC6 BAVH
TJAA

For (level 5) sprint cars enter this code at the password screen: EUJQ QFUW SDBY AMAF
3MAA.

For (fully stocked) circuit cars enter this code at the password screen: 2VP8 ZLFE WKDN
CSXH TDAB