Vertical door kits allow your Mustang to have the "Lamborghini" style door hinges. This will allow you to open your door normally 12"-18". From there the door will stop and not open horizontally any further. Once done you will now grab the edge of the door and lift vertically. The door will then reach a pre-determined point at which it will not lift anymore. At this point you will be able to get in and out of the vehicle. In normal cases the bottom back portion of the door will be higher than the roof of the vehicle. Kit includes 2 gas shocks, 2 VDC hinges (one for each side), and all mounting hardware. This is a bolt-on kit. Sold per kit.