This S&S® Stealth air cleaner kit fits 1999-'06 HD® big twins. Increased filter area, combined with an air horn like radiused inlet and unique S&S® 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, a stock 1999-later big twin air cleaner cover may be used. Kit includes back plate, filter element, top cover, hardware, and instructions.