There is a groove on the back of the part for the HD O-ring gasket

The Air Force Master Sergeant - TC Air Cleaner Cover creates a prominent custom focal point with precision-machined artwork and a premium decorative finish

especially if the primary cover is not factory stock

Fits ’99-’00 Evolution 1340

82nd Airborne 7 ¾ inches in diameter Harley-Davidson-Electra-Glide-Ultra-Limited-2011 There is a groove onThe 82nd Airborne 7 inches in diameter combines precision engraving with a premium finish for riders who want their motorcycle to reflect their style, service, or personal story. Product Details Billet Aluminum, Chrome Plated Derby Cover. This derby cover is 7 inches in diameter. Please check your existing derby cover to confirm that it is 7 inches also. This part is also made with a diameter of 7 inches. Our process is to engrave the design onto a