With so many vent and AC combinations available on the Sprinter, one would think that custom roof racks are the only way to go. Not any more! Aluminess has developed a modular roof rack that works around the 2 standard vent locations in the 144WB and the 3 standard vent locations in the 170WB. The roof rack even works with the factory AC! The standard kit includes panels for 1 large or small vent. Additional vent kits can be purchased if your van has multiple vents. Want a full deck with no openings? Add the vent cover kit and now you have a full solid floor!