Black Box Classic Car:
To unlock the Black Box Classic car beat the Short Track Challenge.
Black Box Exotic Car:
To unlock the Black Box Exotic car beat the Half Season.
EA Sports Car:
To unlock the EA Sports car win the Road Course Challenge.
Beat the Super speedway Shootout under either veteran or legend difficulty settings.
Treasure Island Track:
Beat a season under the veteran difficulty setting.
Beat the full season in rookie mode to unlock the king Richard Petty.
If your leading the race or betwen 5th place get a yellow flag, pull into the pits then abort it. You should pull out in front of the pace car in 1st place. Then it should put you in the back of the pack in first place. You should be able to lap the other cars.
GameShark Codes(M) Must Be On EC8AC8541456E79B Auto Pilot / Low Lap Time This code will put the race into auto pilot mode until you hold the X button for 3 seconds. If you qualify for Pole Position, this code will allow you to take first place easily. Unfortunately the auto pilot doesn't exceed 81 MPH. 0CAD2AAE1446E765 1CBE7E6C14AE9E18 No Car Damage in Arcade Mode 4CB45A42 1456E7A5 4CB45A4A 1456E7A5 4CB45A4E 1456E7A5 4CB45A52 1456E7A5 4CB45A56 1456E7A5 4CB45A5A 1456E7A5 4CB45A5E 1456E7A5 4CB45A62 1456E7A5
Thanks to Revolution readers brian hulsizer, Lee&Kris, prime_time and Josh Rhodes!