S&S Stealth HOG 58mm Throttle Body Air Cleaner Kit The S&S Stealth Air Cleaner Kits allow for a significant amount of performance increase through out the rev range. S&S's R&D team puts in extensive amount if time and effort to release the best performing accessories for your machines and they did just that with the Stealth Air Cleaner Kits. They've produced an extra strength synthetic polymer backing plate that is working to reduce the heat that transfers to your intake. S&S has options if you don't want to show off or want one of their awesome covers that are available in chrome or black finishes. Features For the rider who likes to go fast, but doesn't like to advertise Throttle body has Increased filter area, combined with an air horn like radiused inlet and unique S&S Cycle stinger cone to allow smoother faster air flow for more power. This kit does not include an air cleaner cover. Can be run without a cover or for a sleeper look, or for a little more style and a high performance look, S&S Cycle offers a number of good looking Stealth covers. This kit does not allow stock cover to be reused Kit includes back plate, filter element, top cover, hardware, and instructions. Kit works with S&S Cycle 58mm Throttle Hog throttle body