Installation:

1. copy deluxowb folder to:
X:\Grand Theft Auto V\update\x64\dlcpacks 

2. Use OpenIV go to:
X:\Grand Theft Auto V\update\update.rpf\common\data\dlclist.xml 
right click edit, add new line

<Item>dlcpacks:/deluxowb/</Item>


ENGINE SOUND:
Go to:
https://www.gta5-mods.com/vehicles/nissan-skyline-r32-r33-r34-rb26dett-i6-engine-sound-mod-for-gta-v
I recommed this engine sound from Aquaphobic and its easy to install.


After you download and install the sound mod open OpenIV and go to: GTAV/mods/update/x64/dlcpacks/deluxowb/dlc.rpf/common/data/levels/gtav
then edit vehicles.meta and replace the line of text from this <audioNameHash>sultan3</audioNameHash> to this <audioNameHash>rb26dett</audioNameHash>
and you're done!