Today on our 2013 Toyota Corolla, well be test fitting the Thule Sonic Medium Rooftop Cargo Box Glossy Black in color with 13 cubic feet of space, part number TH634B. Now will our roof rack system already assembled on our vehicle, well begin our test fit by placing the cargo box onto the vehicles crossbars. You may want to loosen up the claws before fitting the cargo box onto the vehicles… see more >