The "300 Cars" version specifically adjusts the . Standard GTA V has a hardcoded limit on the number of vehicles the engine can handle simultaneously. When players install "Add-On" cars (custom vehicles added to the game without replacing existing ones), they often exceed this limit. This mod increases that limit to support a fleet of approximately 300 additional vehicles.
Without this mod, players who install too many car packs often experience: https wwwgta5modscom misc gta5gameconfig300cars top