Product Information Exterior valve cover bolt kit, includes x17 11120036235 M6X40mm fastening elements and x1 11122248555 M6X37.5mm Fastening elements About Genuine BMW The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.