New K&N Air Filter #KNRK3942

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.

Designed for Harley-Davidson motorcycles
Increase horsepower and torque
Easy to install
Made in USA
Backed by K&N warranty

For over 40 years K&N has been designing and manufacturing performance air filters for the motorcycle and ATV enthusiast interested in maximizing horsepower and acceleration. Our air filter is designed to achieve high, virtually unrestricted air flow while maintaining filtration levels critical to ensure long engine life. K&N Air Filters will NOT void Motorcycle Warranty and are environmentally friendly. K&N Reusable Air Filters reduce the volume of disposable air filters that end up in landfills!

• Designed to provide increased Horsepower and Acceleration
• Pleated cotton media provides a large filtration area offering low restriction and long service intervals
• Multi-Layers of woven cotton gauze media offers excellent filtration
• Fits directly into OEM Airbox with application specific Sealing Bead ensuring a precise fit
• No fuel Management modifications are normally required to obtain increased performance
• Washable & reusable, most are pre-oiled and ready to ride!

Make	Model	Year Range	Capacity
Harley Davidson	FLD DYNA SWITCHBACK	2013-2017	1690
Harley Davidson	FLFBS SOFTAIL FAT BOY	2018-2021	1690
Harley Davidson	FLHRC ROAD KING CLASSIC	2013-2015	1690
Harley Davidson	FLHTCKSE 1803 CVO ULTRA LTD	2013-2013	1803
Harley Davidson	FLHTCU 1690 ULTRA CLASSIC ELECTRA GLIDE LTD	2013-2015	1690
Harley Davidson	FLHTCUTG 1803 TRI GLIDE	2014-2014	1803
Harley Davidson	FLHTCUTG TRI GLIDE ULTRA	2015-2015	1801
Harley Davidson	FLHTK ELECTRA GLIDE ULTRA LIMITED	2013-2014	1690
Harley Davidson	FLHTKSE 1803 ULTRA LIMITED	2014-2015	1803
Harley Davidson	FLHX STREET GLIDE	2013-2013	1690
Harley Davidson	FLHXS STREET GLIDE SPECIAL	2015-2021	1690
Harley Davidson	FLHXSE 1803 CVO STREET GLIDE	2013-2021	1803
Harley Davidson	FLHXSE CVO STREET GLIDE	2015-2015	1801
Harley Davidson	FLHXSE STREET GLIDE SPECIAL	2015-2016	1690
Harley Davidson	FLS SOFTAIL SLIM	2015-2017	1690
Harley Davidson	FLSL SOFTAIL SLIM	2018-2021	1690
Harley Davidson	FLSTC SOFTAIL HERITAGE CLASSIC	2013-2017	1690
Harley Davidson	FLSTC SOFTAIL HERITAGE CLASSIC	2018-2021	1868
Harley Davidson	FLSTF SOFTAIL FAT BOY	2013-2017	1690
Harley Davidson	FLSTFB SOFTAIL FAT BOY LO	2012-2017	1690
Harley Davidson	FLSTN SOFTAIL DELUXE	2013-2017	1690
Harley Davidson	FLTR 1803 CVO ROAD GLIDE CUSTOM	2013-2013	1803
Harley Davidson	FLTRUSE CVO ROAD GLIDE ULTRA	2015-2017	1801
Harley Davidson	FLTRXS ROAD GLIDE SPECIAL	2015-2021	1690
Harley Davidson	FXBR BREAKOUT	2018-2021	1690
Harley Davidson	FXDC DYNA SUPER GLIDE CUSTOM	2013-2013	1584
Harley Davidson	FXDC DYNA SUPER GLIDE CUSTOM	2014-2015	1690
Harley Davidson	FXDF DYNA FAT BOB	2013-2017	1690
Harley Davidson	FXDWG DYNA WIDE GLIDE	2013-2017	1690
Harley Davidson	FXSB BREAKOUT	2013-2017	1690
Harley Davidson	FXSBSE 1803 BREAKOUT CVO	2013-2013	1803
Harley Davidson	FXSBSE 1803 CVO SOFTAIL	2013-2013	1803
Harley Davidson	FXSBSE 1803 CVO SOFTAIL DELUXE	2014-2015	1803
Harley Davidson	FXST SOFTAIL STANDARD	2013-2015	1690

 

KRK-3942