Get Bolt-On Power for your 2008-2015 Harley® FL with a High Flow Air Intake System

The K&N RK-3946X is a complete replacement intake system for your Harley FL

Well, that’s just what the K&N RK-3946X Street Metal high-flow air intake system can do for your Harley-Davidson FL model. K&N’s dynamometer testing revealed an estimated horsepower gain of over 7.5 horsepower when the RK-3946X was installed on a stock 2015 103 CI Harley-Davidson Street Glide.

That same Street Glide showed an estimated increase in torque of almost 9 foot-pounds at approximately 2800 RPM with the RK-3946X intake. Of course, your performance gains will vary by model, bike set-up, and condition. However, you can expect a noticeable bump in acceleration and power with the RK-3946X intake.

The RK-3946X is designed as a complete replacement for the stock Harley intake and filter. The intake mounts directly to the throttle body with an integrated aluminum internal-run breather system incorporated in a custom aluminum backing plate.

Everything that is needed for easy installation is included in the RK-3946X kit

The “X” in the RK-3946X indicates that the intake features an extra tall air filter design that provides even more air flow and longer service intervals than standard RK-series air intakes. It is a perfect addition to large engine builds or for bikes that have other modifications like a supercharger or tune that will benefit from the significant increase in airflow.

K&N’s legendary cotton gauze filter material ensures that only clean, filtered air makes it to the big jugs on your V-twin. The pleated element is fully washable and reusable and comes with K&N’s 10-Year/Million Mile Limited Warranty. It is pre-oiled and ready to install directly out of the box.

Take a look at the extensive application list below, and consult K&N’s online application search tool for all of your Harley filtration needs.

The RK-3946X compliments the look of the Harley V-twin