Today on our 2012 Volkswagen Routan, we will be test fitting the Thule Sonic XXL rooftop cargo box. That's part number TH636S. Now, this has 22 cubic feet of space. It comes with a nice metallic finish as you can see there. On our vehicle today, it already has its factory rails installed. I would like to say that this rack will fit most roof rack systems.… see more >