Abstract: A dual overhead door system having a pair of vertical tracks (5) mounted on either side of a door opening which is connected to a pair of dual spaced apart horizontal tracks (3, 4). The horizontal tracks (3, 4) have a curved segment (6) wherein horizontal tracks meet at a junction to form a single track connected to a top of the vertical track (5). The curved segment in the horizontally tracks contain a special swivel gate (7) which blocks either of the horizontal tracks to keep one door from moving into the vertical section when the other door is already in place and to provide minimum distance between the horizontal tracks for installation in low ceiling applications. A kit and method for converting a single overhead door system into a dual overhead door system is also provided.