I'm using a Yakima system. It consists of 4 LowRider towers and 2 58" cross bars. I'm also using the Yakima WindJammer attachement to reduce wind noise.
You can use the Yakima website to put together the proper system for your SAV.
2013 535i - ED, Oct 2012 | Cashmere Silver | Oyster/Black Nappa Anthracite | ZCW | Sirius | Air Blue 80
2008 X3 | Monaco | Sand/Black Light Poplar | ZAP | ZPP | ZCW | Xenon | Rear Fog
1988 Grand Wagoneer | Burgundy | Ghost Flames | 360 ci | Holley carb
BMW CCA #422951