How to Mount Thule Wind Fairing on OEM MK4 Roof Racks - YouTube
Thule Airscreen XT Wind Fairing - Ski
Put a wind deflector on, see If that will help with the wind noise. Had to make up some custom brackets as the Thule supplied brackets wouldn't fit OEM roof rack. :
Amazon.com: Thule AirScreen XT Wind Fairing, Black : Automotive
Amazon.com: Thule AirScreen Fairing, 32", Black : Automotive