Use Open IV to replace 


Handling.meta in Grand Theft Auto V\update\x64\dlcpacks\mpapartment\dlc.rpf\common\data

Vehicles.meta in Grand Theft Auto V\update\x64\dlcpacks\mpapartment\dlc.rpf\common\data\levels\gta5


The 3 deathdune files need to be 'Added' 

in Grand Theft Auto V\update\x64\dlcpacks\mpapartment\dlc.rpf\x64\levels\gta5\vehicles\apartmentvehicles.rpf\

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3 Seater, 2 driver controlled weapons, some extras...
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Credits

Metro 2033 main weapon

Ravaged-2 Dawn Games Vehicle model/ Ripped by Vados

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