Waldo - i now have two cars with this modification (Matte Red and the Silver car) and would not do it again... wait until the rally and really look at them close... they look cool when open, and save room in parking lots but you have to hold your tongue right to close them and they are make entry and exit of the car more difficult. If you shut them too quickly they can jump off the track and scratch the paint on the top of the door and require a hard shut to latch properly but you only have a couple of inches of horizontal travel to do that in... Shelby installed both of these so these are as good as they get and I still would not do it again... if you do just get Shelby to do it...