Download Cars @ DBZ (Doorbreakerz) - Low Power => Drift Cars Pack (by Vosan)

Download Track @ Transfagarasan (AssettoCorsa.club)

The <INSTALLATION_FOLDER> usually is located in:
C:\Program(x86)\Steam\steamapps\assettocorsa\

You can find your Track-Directory in:
<INSTALLATION_FOLDER>\content\tracks\ <---

The track directory of the new track should reside here.