These are extensions that fit under the existing side skirts and give the car a slightly lower stance and aero effect. These pieces are flat and attach parallel to the ground and enhance the ground effects look. These blend nicely with the M Performance front splitter and can be painted or left matte black. They install with double sided tape (included and pre-applied) but additional adhesive may be desired. They come finished in a stealthy matte black but can be painted to increase their visual effect. These sideskirts fit all F82 M4 coupes and F83 M4 Convertibles.