This livery is made for the URAS-Skyline ER34 made by [YCA]Vsoreny
https://fr.gta5-mods.com/users/Vsoreny (love his car btw)
Link of the car:
All you need to do is following the step in the aRead-Me.txt but if you download this you already know how to install a livery for a car.
i hope you will like this livery
(P.S Sorry for the bad quality of the pic i don't have a good computer for running gta in good conditions)