I can't change the vehicles sounds

So I’ve been trying to put this: Other Turbo Sound - GTA5-Mods.com and this: Other Backfire Sound - GTA5-Mods.com in my GTA V.
Now, what I need is put these sounds Client sided only. I’ve been trying to do it and I’ve followed the tutorials in the links, but, when I go into a server, the sounds just don’t work. So, I only want to know, is it possible to put custom turbo and backfire sounds CLIENT SIDED, like you would with weapons (I did it with weapons and it worked just fine), or is it not?

If it’s possible to do, can you explain how? Thanks in advance! :wink: