@Dauven car mods in the Vehicles category are replacement or add-on vehicles. Replacement, as the name implies, replace an existing in-game vehicle. Add-on vehicles are brand new vehicles added to the game, much like official DLC vehicles.
car mods in the Paint Jobs category are reskins of either in-game vehicles or add-on/replacement vehicles.
All mods on this website are for Singleplayer only. We do not condone using mods online, so please keep that in mind in the future. Thank you.