K&N Engineering KN Motorcycle Air Intake Systems-Harley Davidson Cold Air Intakes - RK-3909-1

K&N's RK Series was developed to get more horsepower from your Twin Cam Harley-Davidson engine. Built around the legendary K&N High-Flow Air Filter, the this RK Series assembly includes an innovative powder coated billet aluminum back plate that eliminates external breathers and features a built-in, dyno-tuned velocity stack. The result is a significant airflow increase to the engine without sacrificing filtration. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover. The RK-3910-1 comes with a larger air filter and longer spacers than the RK-3909-1.

The latest addition to K&N's RK Series was developed to get more horsepower from your Twin Cam Harley-Davidson engine. Provides a significant airflow increase to the engine without sacrificing filtration.

K&N Red Intake System for Harley-Davidson

Designed to increase horsepower & torque

Intake System-Harley Davidson

Dyno-tuned velocity stack

Excellent air filtration

Washable and reusable

Air Cleaner Assembly

Air Intake System