to install vehicle, go to path:

C:\Program Files\Rockstar Games\Grand Theft Auto V\mods\update\x64\dlcpacks
create new folder named aventadors and add DLC.rpf to this.

Now, go to 
C:\Program Files\Rockstar Games\Grand Theft Auto V\mods\update\update.rpf\common\data

and open DLCList.xml and add the following line:
		<Item>dlcpacks:\aventadors\</Item>



