Those are just all of the configs, delete them to remove them, but beware as it removes those options from the game.
i'm trying to get one with a shell, but im not exactly sure how to delete them without deleting the whole car it dosen't do this if i import a pessima though. i'm not sure if i'm being dumb or something but i'm really confused edit: nvm, i think i got it
If it doesn't do that if you import a pessima but does when you do a d series, that is because for the crew cab, extended cab, and regular cab, they all need to be conjoined into one location and will be listed in the pc files later