Now I’ll take a break from these ADD-ONs because it’s pretty boring to do (this will be the last for now).
Installation guide (OpenIV):
Mods/update/x64/dlcpacks and drop it 2015MUSTSOUND FOLDER here.
dlcpacks:/2015mustsound/ add this line in dlclist.xml
change the audionamehash (vehicle.meta) to 2015mustsound
Car: 2019 Ford Mustang GT
Credits:
SKypilaine