Tokyo Xtreme Racer: Zero Cheats

Purchase an R30 or R30M and buy the Type-5 spoiler. When racing, you will now have a machine gun mounted on the top. Press the Reverse button (by default O) to fire it. Be warned, this actually moves cars forward as opposed to destroying them.

Select the rear spoiler type 5 for R30 and R30M to change the horn to an extremely loud siren.