Joker Machine Smooth Air Cleaner Cover For Harley Upgrade your air cover cleaner and add extra personality at the same time. Made from billet aluminum and comes with all mounting hardware needed to install. This air cover is a great addition to any bike and matches other parts from Joker Machine to help take your bike to the next level. Features CNC-machined from billet aluminum Covers the outside of the air filter when replacing the existing air cleaner cover Fits over a 5.5 area overall outside diameter is 5.75 All necessary mounting hardware included