Zero-4 Champ RR-Z (Import) Cheats & Tips

By entering the name "Do-h-ga-me" (hiragana, literally means "dumb tortoise") when the Story mode starts, you can immediately have the jet engine.

To install it, choose the option "Dogu-O-Tsukau" ("Use an Item") and then choose "Jetoenjin" (phonetic borrowing of "Jet Engine"). Your car will have extreme power on wet courses!