We are still searching for game pictures and screenshots for D1 Grand Prix (PlayStation 2). We do not have any cheats, codes, or hints yet.

You must complete all seasons in D1 Series including Custom and beat Survival Mode.

To unlock these characters cars, you have to beat them in Survival Mode:

Car - How to unlock

Cop Car P34 - Beat opponent 38.
Daijiro Inada's Stream Option Z33 - Beat opponent 15.
Keiichi Tsuchiya's AE86 - Beat opponent 32
Manabu Orido's Eclipse Advan JZA80 - Beat opponent 20
Manabu Suzuki's RB1 - Beat opponent 10
Tarzan Yamada's Taisan Benihana Viper - Beat opponent 26
Zaku's B310 - Beat opponent 5