S&S Cycle Breather Conversion Kit 17-0486 Improved breather hardware for Super E & G air cleaner kits Banjo fittings are sealed with silicone coated washers instead of O-rings. The washers are much more durable and seal better to prevent leaks Banjo fittings and breather hose that they plug into are mounted on the cylinder head before the air cleaner backplate is installed. They do not need to be removed if the backplate is removed for service. This makes it much simpler to install and service the air cleaner assembly