This S&S Stealth air cleaner kit for 2008-'17 HD Twin Cam, 103, 110 Tri-Glide and CVO stock-bore throttle by wire nodels . Increased filter area, combined with an air horn like radiused inlet and unique S&S stinger cone result in 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, a stock 1999-later big twin air cleaner cover may be used. For a little more style and a high peformance look, S&S offers a number of good looking covers. Kit includes back plate, filter element, top cover, hardware, and instructions.