Vertical Doors Inc. bolt on Lambo doors are designed to work directly with your specific vehicle. The new hinge system replaces your current door hinges. You will continue to use your current vehicle doors. Doors are never removed during installation. Once the new hinge is installed, your doors will first open out as they typically do, and then travel up in the air. The doors are held up by heavy duty gas pressured shocks that have been engineered with the exact force to hold each vehicle specific door in the "upright Lambo position". Welding is not required with this kit. Manufactured in the USA, this product surpasses the standards of all other Lambo kits on the market. Unlike other vertical door brands, the metal used in this product can support the weight of your heavy doors and will last for years to come.