K&N Street Metal Series High-Flow Air Intake Systems look good, offer increased airflow, and deliver more horsepower & torque to your Harley-Davidson® motorcycle. These intake systems increase 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 maximum airflow and extended service intervals. A durable mounting gasket is also included to help absorb vibration. K&N Air Filters are washable, reusable, pre-oiled, and ready for installation.