Race and dyno proven air cleaners feature a low profile and free flowing design that creates more power over standard flat air cleaner assemblies. Kits include a high flowing dropped base with matching lid and a 1" sure seal spacer with an integrated O-ring for a positive seal on carburetors with a 5-1/8" neck. Kit also includes a pre-oiled washable element in choice of 3", 4", 5" or 6" height. Choose from plain or black coated finish lid and base. The 1" spacer included in this kit places the bottom of the air cleaner base 5/8" below carb neck sealing flange.