How to Install:
(backup your files)
Run OpenIV
open C:\Games\Grand Theft Auto V\mods\x64k.rpf\levels\gta5\_citye\scentral_01 switch on edit mode and replace the sc1_00e.rpf folder

Replace both car files in the folder where your cars at.
In my case it was: C:\Games\Grand Theft Auto V\mods\x64w.rpf\dlcpacks\mpindependence\dlc.rpf\x64\levels\gta5\vehicles\mpindependencevehicles.rpf\
and
C:\Games\Grand Theft Auto V\update\x64\dlcpacks\mptuner\dlc.rpf\x64\levels\gta5\vehicles\mptuner.rpf\
Enjoy and have fun : o )