Today on our 2015 Volkswagen GTI, we will be test fitting the Thule Sonic large rooftop cargo box. It offers 11 cubic feet of space. It's part number is TH634B and it comes in a nice glossy black finish. We can go ahead and start, we can go ahead and throw our box on top with our Thule Aeroblades already installed. We'll want to go ahead and line up where our clamps will go over our bars. We'll go… see more >