The K&N RK-3942 High-Flow Air Intake System increases engine intake airflow and delivers more horsepower & torque to your Harley-Davidson® motorcycle. 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 aluminium backing plate mounts directly to the throttle body via an aluminium integrated, internal-run breather system. The intake system comes with a K&N Air Filter for high airflow and long service intervals. The K&N High-Flow Air Filter is washable, reusable, pre-oiled and ready for installation. Features: Designed for Harley-Davidson motorcycles. Increase horsepower and torque. Easy to install. Made in the USA. Specifications: Estima ted Horsepower Gain: 9.32 HP @ 4803 RPM Replacement Filter: E-3980 Air Filter Material: Cotton Gauze Air Filter Height: 56mm Inlet Diameter: 33mm Overall Height: 56mm
