All motorcycle kits come with a rigid, lightweight, billet aluminum cage which provides a tighter air box seal. No leaks means more power. Constructed from two layers of high flow open pore foam. The NEW inner sealing ring moves the location of the filter mounting closer to the front of the airbox resulting in easier filter service. The sealing ring also helps eliminate filter tears due to filter installation/removal. Kit with Sealing Ring- $224.99 (Shown on the left)