Retains the stock air filter cover; making it a genuine sleeper set-up. Even better breathing through the included high-flow K&N air filter element. Incl. air cleaner backplate; complete with high-Flow K&N filter element and features integrated crankcase breathers; eliminating external hoses and fittings. Note: Air cleaner cover not included and must be re-used. Compatible with the stock oval or 14-17 rounded air cleaner covers.