I've had a couple of NOS sets for years and failed to post the photos. These parts are indeed very rare, specially designed and used in the 917 and 906 to aid in the cooling of the race engine by deflecting air around the cylinder's cooling fins. Incidentally, ALL of the NOS factory original pieces I have here are made out of Aluminum https://pbase.com/9146gt/image/144220689 and not steel https://pbase.com/9146gt/image/144222320. My "Aluminum Magnet" won't stick to my parts. Take a look...