Amazon.com: Thule AirScreen XT Wind Fairing, Black : Automotive
OEM Base Rail System (Roof Rack) and Thule Cargo Box + Thule Fairing - BMW 3-Series (E90 E92) Forum
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 Fairing, 32", Black : Automotive
Amazon.com: Thule AirScreen Fairing, 32", Black : Automotive
Buy Thule Wind Fairing Install | UP TO 60% OFF
Thule Fairing (32" Small) Wind deflector reduces noise and improves mileage at Crutchfield
Thule AirScreen XT Roof Rack Wind Fairing L - 44in. (Black) — Panda Motorworks