K&N has built this R&K Air Intake Series around assisting your Harley-Davidson to get more horsepower out of it with a simple upgrade, so get ready to go fast with their excellent air filtration. K&N has built these assemblies to replace the stock air filter and backplate with their oversized air filter and custom backing plate design per application. Choose between one of the clean covers or go with no cover at all to maintain the stock appearance. As most of K&N's filter elements they have to offer these are washable and able to be reused once they are recharged. The K&N RK-Series High-Flow Air Intake System increases engine intake airflow and delivering more horsepower & torque The intake system increases power by eliminating the stock OE air cleaner and replacing it with a complete High-Flow Air Intake System The sturdy, custom aluminum backing plate mounts directly to the throttle body via an aluminum integrated, internal-run breather system The intake system comes with a K&N Air Filter for high air flow and long service intervals The K&N High-Flow Air Filter is washable, reusable, pre-oiled and ready for installation Replaces the stock air filter and cleaner backing plate assembly Fits behind the OE air cleaner cover maintaining the factory appearance Washable, oversized K&N high-flow air filter equals longer life Dyno tuned velocity stack directs airflow to engine Built in breathers replace external OE breathers Includes K&N Million Mile Limited Warranty