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Supplier details checked 2026-09-23 · Test catalog
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K&N's Street Metal Series High-Flow Air Intake Systems offer increased airflow and deliver more horsepower & torque to your Harley-Davidson motorcycle.
Intake System-Harley Davidson
Backed by K&N warranty
Associated products: E-3980 SPECIAL ORDER Oval Fltr, 99-5000 Filter Care Service Kit Aerosol
K&N Intake System 13-15 Harley-Davidson Breakout/Fatboy/Deluxe 103 CI
Air Intake System
The K&N RK-3942 High-Flow Air Intake System increases engine intake airflow and delivering 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 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.
Unleash your Harley-Davidson's true power with this K&N High-Flow Air Intake System. This performance upgrade replaces the factory air cleaner with a precision-engineered system designed to maximize airflow and boost horsepower. Featuring K&N's world-renowned washable and reusable air filter, the RK-3942 delivers exceptional engine protection while providing long-lasting performance. Its integrated aluminum backing plate streamlines air delivery directly into the throttle body, improving throttle response and acceleration. Built for riders who demand both performance and style.
Air Cleaner Assembly
