These carbon fiber door sills are a direct replacement for the stock plastic sills. The sills come with pre-drilled attachment holes and top-quality 3M mounting strips along the outboard edge. They fit all versions of the Ferrari 550 and 575, with no modifications to either the part or the vehicle. They include the built-in indentation that houses the stock stainless steel “Ferrari” logo plate. Thick urethane clear coat provides incredibly smooth, deep gloss and excellent durability.