Because our systems are of a higher quality and designed to work on the car they are sold for, the install process is much simpler. If you purchased one of our fully automatic power doors, there is no need to purchase a separate shaved door kit because they are included with the full power door upgrade. Recreating Broken Taillights with Polyurethane Casting. While it is shown on the outside of the door, it will eventually move to the inside once all the adjustments are made. To keep the cable from rubbing the steel, breaking, or binding, we used a piece of backstrap and the metal-lined sleeve came with the kit to change the direction of the cable.