Drag reduction apparatus (18) attachable to a vehicle (10) wherein the drag reduction apparatus has a hollow duct section (21) having an open bottom end (43, 44) and a front wall (35) and a pair of opposed side walls (30, 31) wherein the front wall (35) and each side wall (30, 31) have a plurality of air outlets (42, 36, 37, 38, 39, 40, 41, 32, 33, 34) and a hollow air intake section (19) in fluid communication with the hollow section (21) having at least part thereof (87) in use spaced from a vehicle roof (13) and unsupported by the vehicle roof (13).