Regardless of installation method, you need to do the following:
To use on any car, edit the vehicles.meta it is defined in, and replace this line with;
<audioNameHash>aq14nisvq37vhrt</audioNameHash>

Install this first.
- https://www.gta5-mods.com/vehicles/nissan-vq37vhr-turbo-engine-sound-oiv-add-on-fivem-sound/download/139371