First i have to say that this is not my first sound mod on Assetto but with Fmod yes...
i spent my time to drift on Assetto and i just want to enjoy a little more this awesome car so if you want, you can try
Back up original files first !
Go to Steam\SteamApps\common\assettocorsa\content\cars\nissan_180sx_typex_2jz
Back up SFX folder
delete sfx folder
extract the rar on the car folder