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K&N's RK-3932XB Air Intake System Adds Horsepower and Torque to Your Harley-Davidson®

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K&N RK-3932XB installed on 2016 Harley-Davidson Switchback

The RK-3932XB intake on a Harley-Davidson

Harley-Davidson motorcycles often respond more profoundly to simple performance modifications than motorcycles with other engine configurations. In stock form, Harley-Davidson engines are “under stressed.” What that means is that the engines are designed for a rather conservative balance between reliability and pure performance.

That’s where K&N’s RK-3932XB comes in. The product is one of K&N’s Street Metal series high-flow air intake systems. In short, the system helps your Harley® breathe freely resulting in a potentially substantial power advantage. The RK-3932XB is a complete intake system that replaces the restrictive stock unit. The air filter in the system is extra tall, which markedly increases airflow. The oiled cotton gauze filter media not only increases flow, but it also extends service intervals. You know you’d rather be riding your Harley than servicing it.

Installation of the RK-3932XB could not be more straightforward. The custom aluminum backing plate and vibration absorbing gasket fit securely to the throttle body and feature an internal-run breather system. Once installed, you can realize an estimated 7 horsepower gain at 4662 RPM (as dyno tested on a stock 2016 Harley-Davidson Dyna Switchback 103 ci). That performance boost is the kind you’ll feel instantly. Interestingly, that horsepower gain is more than the first Harley-Davidsons produced in total! The intake unit is especially well suited for custom or large engine builds that truly need that extra airflow.

K&N RK-3932XB intake exploded view

The clean lines of the RK-3932XB intake system

The air filter unit on a Harley is a centerpiece of the engine design so it has to be good looking. The RK-3932XB has a subtle, clean appearance. The iconic K&N red-oiled filter media is visible behind the understated black intake cover. The overall aesthetics of the intake speak to its “all business” design and performance.

It should be noted that over the life of the motorcycle, a K&N washable filter is a cost effective alternative to restrictive, disposable filters. Moreover, in a time when our landfills are being loaded with throw-away maintenance items, a reusable K&N filter such as the E-3986, which is the part number for the filter, is an environmentally responsible choice.

The RK-3932XB is made in the USA and is covered by K&N’s exclusive Million Mile Limited Warranty. With easy installation, proven power gains, extended service intervals, good looks, and legendary K&N quality, the RK-3932XB is a great option for Harley-Davidson owners who want more out of their V-twin.

K&N RK-3932XB street series intake for Harley Davidson motorcycles

The RK-3932XB is simple, bolt-on performance for your Harley

The RK-3932XB fits these Harley-Davidson models:
2016 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 103
2016 HARLEY DAVIDSON FXDL DYNA LOW RIDER 103
2016 HARLEY DAVIDSON FXDF FAT BOB 103
2016 HARLEY DAVIDSON FXDB DYNA STREET BOB 103
2016 HARLEY DAVIDSON FLD SWITCHBACK 103
2015 HARLEY DAVIDSON FXSB BREAKOUT 103
2015 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 103
2015 HARLEY DAVIDSON FXDL DYNA LOW RIDER 103
2015 HARLEY DAVIDSON FXDF FAT BOB 103
2015 HARLEY DAVIDSON FXDB DYNA STREET BOB 103
2015 HARLEY DAVIDSON FLSTN SOFTAIL DELUXE 103
2015 HARLEY DAVIDSON FLSTFB SOFTAIL FAT BOY LO 103
2015 HARLEY DAVIDSON FLSTF FAT BOY 103
2015 HARLEY DAVIDSON FLSTC HERITAGE SOFTAIL CLASSIC 103
2015 HARLEY DAVIDSON FLS SOFTAIL SLIM 103
2015 HARLEY DAVIDSON FLD SWITCHBACK 103
2014 HARLEY DAVIDSON FXSB BREAKOUT 103
2014 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 103
2014 HARLEY DAVIDSON FXDL DYNA LOW RIDER 103
2014 HARLEY DAVIDSON FXDF FAT BOB 103
2014 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 103
2014 HARLEY DAVIDSON FXDB DYNA STREET BOB 103
2014 HARLEY DAVIDSON FLSTN SOFTAIL DELUXE 103
2014 HARLEY DAVIDSON FLSTFB SOFTAIL FAT BOY LO 103
2014 HARLEY DAVIDSON FLSTF FAT BOY 103
2014 HARLEY DAVIDSON FLSTC HERITAGE SOFTAIL CLASSIC 103
2014 HARLEY DAVIDSON FLS SOFTAIL SLIM 103
2014 HARLEY DAVIDSON FLD SWITCHBACK 103
2013 HARLEY DAVIDSON FXS BLACKLINE 103
2013 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 103
2013 HARLEY DAVIDSON FXDF FAT BOB 103
2013 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96
2013 HARLEY DAVIDSON FXDB DYNA STREET BOB 96
2013 HARLEY DAVIDSON FLSTN SOFTAIL DELUXE 103
2013 HARLEY DAVIDSON FLSTFB SOFTAIL FAT BOY LO 103
2013 HARLEY DAVIDSON FLSTF FAT BOY 103
2013 HARLEY DAVIDSON FLSTC HERITAGE SOFTAIL CLASSIC 103
2013 HARLEY DAVIDSON FLS SOFTAIL SLIM 103
2013 HARLEY DAVIDSON FLD SWITCHBACK 103
2012 HARLEY DAVIDSON FXS BLACKLINE 103
2012 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 103
2012 HARLEY DAVIDSON FXDF FAT BOB 103
2012 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96
2012 HARLEY DAVIDSON FXDB DYNA STREET BOB 96
2012 HARLEY DAVIDSON FLSTN SOFTAIL DELUXE 103
2012 HARLEY DAVIDSON FLSTFB SOFTAIL FAT BOY LO 103
2012 HARLEY DAVIDSON FLSTF FAT BOY 103
2012 HARLEY DAVIDSON FLSTC HERITAGE SOFTAIL CLASSIC 103
2012 HARLEY DAVIDSON FLS SOFTAIL SLIM 103
2012 HARLEY DAVIDSON FLD SWITCHBACK 103
2011 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 96
2011 HARLEY DAVIDSON FXDF FAT BOB 96
2011 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96
2011 HARLEY DAVIDSON FXDB DYNA STREET BOB 96
2011 HARLEY DAVIDSON FXCWC ROCKER C 96
2011 HARLEY DAVIDSON FLSTSB SOFTAIL CROSS BONES 96
2011 HARLEY DAVIDSON FLSTN SOFTAIL DELUXE 96
2011 HARLEY DAVIDSON FLSTFB SOFTAIL FAT BOY LO 96
2011 HARLEY DAVIDSON FLSTF FAT BOY 96
2011 HARLEY DAVIDSON FLSTC HERITAGE SOFTAIL CLASSIC 96
2010 HARLEY DAVIDSON FXSTC SOFTAIL CUSTOM 96
2010 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 96
2010 HARLEY DAVIDSON FXDF FAT BOB 96
2010 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96
2010 HARLEY DAVIDSON FXDB DYNA STREET BOB 96
2010 HARLEY DAVIDSON FXD DYNA SUPER GLIDE 96
2010 HARLEY DAVIDSON FXCWC ROCKER C 96
2010 HARLEY DAVIDSON FLSTSB SOFTAIL CROSS BONES 96
2010 HARLEY DAVIDSON FLSTN SOFTAIL DELUXE 96
2010 HARLEY DAVIDSON FLSTFB SOFTAIL FAT BOY LO 96
2010 HARLEY DAVIDSON FLSTF FAT BOY 96
2010 HARLEY DAVIDSON FLSTC HERITAGE SOFTAIL CLASSIC 96
2009 HARLEY DAVIDSON FXSTC SOFTAIL CUSTOM 96
2009 HARLEY DAVIDSON FXSTB NIGHT TRAIN 96
2009 HARLEY DAVIDSON FXDL DYNA LOW RIDER 96
2009 HARLEY DAVIDSON FXDF FAT BOB 96
2009 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96
2009 HARLEY DAVIDSON FXDB DYNA STREET BOB 96
2009 HARLEY DAVIDSON FXD DYNA SUPER GLIDE 96
2009 HARLEY DAVIDSON FXCWC ROCKER C 96
2009 HARLEY DAVIDSON FXCW ROCKER 96
2009 HARLEY DAVIDSON FLSTSB SOFTAIL CROSS BONES 96
2009 HARLEY DAVIDSON FLSTN SOFTAIL DELUXE 96
2009 HARLEY DAVIDSON FLSTF FAT BOY 96
2009 HARLEY DAVIDSON FLSTC HERITAGE SOFTAIL CLASSIC 96
2008 HARLEY DAVIDSON FXSTC SOFTAIL CUSTOM 96
2008 HARLEY DAVIDSON FXSTB NIGHT TRAIN 96
2008 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 96
2008 HARLEY DAVIDSON FXDL DYNA LOW RIDER 96
2008 HARLEY DAVIDSON FXDF FAT BOB 96
2008 HARLEY DAVIDSON FXDC SUPER GLIDE CUSTOM 96
2008 HARLEY DAVIDSON FXDB DYNA STREET BOB 96
2008 HARLEY DAVIDSON FXD DYNA SUPER GLIDE 96
2008 HARLEY DAVIDSON FXCWC ROCKER C 96
2008 HARLEY DAVIDSON FXCW ROCKER 96
2008 HARLEY DAVIDSON FLSTSB SOFTAIL CROSS BONES 96
2008 HARLEY DAVIDSON FLSTN SOFTAIL DELUXE 96
2008 HARLEY DAVIDSON FLSTF FAT BOY 96
2008 HARLEY DAVIDSON FLSTC HERITAGE SOFTAIL CLASSIC 96
2008 HARLEY DAVIDSON FLHX STREET GLIDE 96
2007 HARLEY DAVIDSON FXSTD SOFTAIL DEUCE 96
2007 HARLEY DAVIDSON FXSTC SOFTAIL CUSTOM 96
2007 HARLEY DAVIDSON FXSTB NIGHT TRAIN 96
2007 HARLEY DAVIDSON FXST SOFTAIL STANDARD 96
2007 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 96
2007 HARLEY DAVIDSON FXDL DYNA LOW RIDER 96
2007 HARLEY DAVIDSON FXDC SUPER GLIDE CUSTOM 96
2007 HARLEY DAVIDSON FXDB DYNA STREET BOB 96
2007 HARLEY DAVIDSON FXD DYNA SUPER GLIDE 96
2007 HARLEY DAVIDSON FLTR ROAD GLIDE 96
2007 HARLEY DAVIDSON FLSTSC SOFTAIL SPRINGER CLASSIC 96
2007 HARLEY DAVIDSON FLSTN SOFTAIL DELUXE 96
2007 HARLEY DAVIDSON FLSTF FAT BOY 96
2007 HARLEY DAVIDSON FLSTC HERITAGE SOFTAIL CLASSIC 96
2007 HARLEY DAVIDSON FLHX STREET GLIDE 96
2007 HARLEY DAVIDSON FLHTCU ULTRA CLASSIC ELECTRA GLIDE 96
2007 HARLEY DAVIDSON FLHTC ELECTRA GLIDE CLASSIC 96
2007 HARLEY DAVIDSON FLHT ELECTRA GLIDE STANDARD 96
2007 HARLEY DAVIDSON FLHRS ROAD KING CUSTOM 96
2007 HARLEY DAVIDSON FLHRC ROAD KING CLASSIC 96
2007 HARLEY DAVIDSON FLHR ROAD KING 96
2006 HARLEY DAVIDSON FXSTSI SPRINGER SOFTAIL F/I 88
2006 HARLEY DAVIDSON FXSTI SOFTAIL STANDARD F/I 88
2006 HARLEY DAVIDSON FXSTDI SOFTAIL DEUCE F/I 88
2006 HARLEY DAVIDSON FXSTBI NIGHT TRAIN F/I 88
2006 HARLEY DAVIDSON FXDWGI DYNA WIDE GLIDE F/I 88
2006 HARLEY DAVIDSON FXDLI DYNA LOW RIDER F/I 88
2006 HARLEY DAVIDSON FXDI35 35TH ANNIV. SUPER GLIDE F/I 88
2006 HARLEY DAVIDSON FXDI DYNA SUPER GLIDE F/I 88
2006 HARLEY DAVIDSON FXDCI DYNA SUPER GLIDE CUSTOM F/I 88
2006 HARLEY DAVIDSON FXDBI STREET BOB F/I 88
2006 HARLEY DAVIDSON FLTRI ROAD GLIDE F/I 88
2006 HARLEY DAVIDSON FLSTSCI SOFTAIL SPRINGER CLASSIC F/I 88
2006 HARLEY DAVIDSON FLSTNI SOFTAIL DELUXE F/I 88
2006 HARLEY DAVIDSON FLSTI HERITAGE SOFTAIL F/I 88
2006 HARLEY DAVIDSON FLSTFI FAT BOY F/I 88
2006 HARLEY DAVIDSON FLSTCI HERITAGE SOFTAIL CLASSIC F/I 88
2006 HARLEY DAVIDSON FLHXI STREET GLIDE F/I 88
2006 HARLEY DAVIDSON FLHTI ELECTRA GLIDE STANDARD F/I 88
2006 HARLEY DAVIDSON FLHTCUI ELECTRA GLIDE ULTRA CLASSIC F/I 88
2006 HARLEY DAVIDSON FLHTCI ELECTRA GLIDE CLASSIC F/I 88
2006 HARLEY DAVIDSON FLHRSI ROAD KING CUSTOM F/I 88
2006 HARLEY DAVIDSON FLHRI ROAD KING F/I 88
2006 HARLEY DAVIDSON FLHRCI ROAD KING CLASSIC F/I 88
2005 HARLEY DAVIDSON FXSTSI SPRINGER SOFTAIL F/I 88
2005 HARLEY DAVIDSON FXSTI SOFTAIL STANDARD F/I 88
2005 HARLEY DAVIDSON FXSTDI SOFTAIL DEUCE F/I 88
2005 HARLEY DAVIDSON FXSTBI NIGHT TRAIN F/I 88
2005 HARLEY DAVIDSON FXDXI DYNA SUPER GLIDE SPORT F/I 88
2005 HARLEY DAVIDSON FXDWGI DYNA WIDE GLIDE F/I 88
2005 HARLEY DAVIDSON FXDLI DYNA LOW RIDER F/I 88
2005 HARLEY DAVIDSON FXDI DYNA SUPER GLIDE F/I 88
2005 HARLEY DAVIDSON FXDCI DYNA SUPER GLIDE CUSTOM F/I 88
2005 HARLEY DAVIDSON FLTRI ROAD GLIDE F/I 88
2005 HARLEY DAVIDSON FLSTSCI SOFTAIL SPRINGER CLASSIC F/I 88
2005 HARLEY DAVIDSON FLSTNI SOFTAIL DELUXE F/I 88
2005 HARLEY DAVIDSON FLSTFI FAT BOY F/I 88
2005 HARLEY DAVIDSON FLSTCI HERITAGE SOFTAIL CLASSIC F/I 88
2005 HARLEY DAVIDSON FLHTI ELECTRA GLIDE STANDARD F/I 88
2005 HARLEY DAVIDSON FLHTCUI ELECTRA GLIDE ULTRA CLASSIC F/I 88
2005 HARLEY DAVIDSON FLHTCI ELECTRA GLIDE CLASSIC F/I 88
2005 HARLEY DAVIDSON FLHRSI ROAD KING CUSTOM F/I 88
2005 HARLEY DAVIDSON FLHRI ROAD KING F/I 88
2005 HARLEY DAVIDSON FLHRCI ROAD KING CLASSIC F/I 88
2004 HARLEY DAVIDSON FXSTSI SPRINGER SOFTAIL F/I 88
2004 HARLEY DAVIDSON FXSTI SOFTAIL STANDARD F/I 88
2004 HARLEY DAVIDSON FXSTDI SOFTAIL DEUCE F/I 88
2004 HARLEY DAVIDSON FXSTBI NIGHT TRAIN F/I 88
2004 HARLEY DAVIDSON FXDXI DYNA SUPER GLIDE SPORT F/I 88
2004 HARLEY DAVIDSON FXDWGI DYNA WIDE GLIDE F/I 88
2004 HARLEY DAVIDSON FXDLI DYNA LOW RIDER F/I 88
2004 HARLEY DAVIDSON FXDI DYNA SUPER GLIDE F/I 88
2004 HARLEY DAVIDSON FLTRI ROAD GLIDE F/I 88
2004 HARLEY DAVIDSON FLSTFI FAT BOY F/I 88
2004 HARLEY DAVIDSON FLSTCI HERITAGE SOFTAIL CLASSIC F/I 88
2004 HARLEY DAVIDSON FLHTI ELECTRA GLIDE STANDARD F/I 88
2004 HARLEY DAVIDSON FLHTCUI ELECTRA GLIDE ULTRA CLASSIC F/I 88
2004 HARLEY DAVIDSON FLHTCI ELECTRA GLIDE CLASSIC F/I 88
2004 HARLEY DAVIDSON FLHRSI ROAD KING CUSTOM F/I 88
2004 HARLEY DAVIDSON FLHRI ROAD KING F/I 88
2004 HARLEY DAVIDSON FLHRCI ROAD KING CLASSIC F/I 88
2003 HARLEY DAVIDSON FXSTSI SPRINGER SOFTAIL F/I 88
2003 HARLEY DAVIDSON FXSTI SOFTAIL STANDARD F/I 88
2003 HARLEY DAVIDSON FXSTDI SOFTAIL DEUCE F/I 88
2003 HARLEY DAVIDSON FXSTBI NIGHT TRAIN F/I 88
2003 HARLEY DAVIDSON FLTRI ROAD GLIDE F/I 88
2003 HARLEY DAVIDSON FLSTSI HERITAGE SPRINGER F/I 88
2003 HARLEY DAVIDSON FLSTFI FAT BOY F/I 88
2003 HARLEY DAVIDSON FLSTCI HERITAGE SOFTAIL CLASSIC F/I 88
2003 HARLEY DAVIDSON FLHTI ELECTRA GLIDE STANDARD F/I 88
2003 HARLEY DAVIDSON FLHTCUI ELECTRA GLIDE ULTRA CLASSIC F/I 88
2003 HARLEY DAVIDSON FLHTCI ELECTRA GLIDE CLASSIC F/I 88
2003 HARLEY DAVIDSON FLHRI ROAD KING F/I 88
2003 HARLEY DAVIDSON FLHRCI ROAD KING CLASSIC F/I 88
2002 HARLEY DAVIDSON FXSTSI SPRINGER SOFTAIL F/I 88
2002 HARLEY DAVIDSON FXSTI SOFTAIL STANDARD F/I 88
2002 HARLEY DAVIDSON FXSTDI SOFTAIL DEUCE F/I 88
2002 HARLEY DAVIDSON FXSTBI NIGHT TRAIN F/I 88
2002 HARLEY DAVIDSON FLTRI ROAD GLIDE F/I 88
2002 HARLEY DAVIDSON FLSTSI HERITAGE SPRINGER F/I 88
2002 HARLEY DAVIDSON FLSTFI FAT BOY F/I 88
2002 HARLEY DAVIDSON FLSTCI HERITAGE SOFTAIL CLASSIC F/I 88
2002 HARLEY DAVIDSON FLHTCUI ELECTRA GLIDE ULTRA CLASSIC F/I 88
2002 HARLEY DAVIDSON FLHTCI ELECTRA GLIDE CLASSIC F/I 88
2002 HARLEY DAVIDSON FLHRI ROAD KING F/I 88
2002 HARLEY DAVIDSON FLHRCI ROAD KING CLASSIC F/I 88
2001 HARLEY DAVIDSON FXSTSI SPRINGER SOFTAIL F/I 88
2001 HARLEY DAVIDSON FXSTI SOFTAIL STANDARD F/I 88
2001 HARLEY DAVIDSON FXSTDI SOFTAIL DEUCE F/I 88
2001 HARLEY DAVIDSON FXSTBI NIGHT TRAIN F/I 88
2001 HARLEY DAVIDSON FLTRI ROAD GLIDE F/I 88 CI - w/Delphi Fuel Injection
2001 HARLEY DAVIDSON FLSTSI HERITAGE SPRINGER F/I 88
2001 HARLEY DAVIDSON FLSTFI FAT BOY F/I 88
2001 HARLEY DAVIDSON FLSTCI HERITAGE SOFTAIL CLASSIC F/I 88
2001 HARLEY DAVIDSON FLHTCUI ELECTRA GLIDE ULTRA CLASSIC F/I 88 CI - w/Delphi Fuel Injection
2001 HARLEY DAVIDSON FLHTCI ELECTRA GLIDE CLASSIC F/I 88 CI - w/Delphi Fuel Injection
2001 HARLEY DAVIDSON FLHRI ROAD KING F/I 88 CI - w/Delphi Fuel Injection
2001 HARLEY DAVIDSON FLHRCI ROAD KING CLASSIC F/I 88 CI - w/Delphi Fuel Injection
2000 HARLEY DAVIDSON FLTRI ROAD GLIDE F/I 88 CI - w/Delphi Fuel Injection
2000 HARLEY DAVIDSON FLHTCUI ELECTRA GLIDE ULTRA CLASSIC F/I 88 CI - w/Delphi Fuel Injection
2000 HARLEY DAVIDSON FLHTCI ELECTRA GLIDE CLASSIC F/I 88 CI - w/Delphi Fuel Injection
2000 HARLEY DAVIDSON FLHRI ROAD KING F/I 88 CI - w/Delphi Fuel Injection
2000 HARLEY DAVIDSON FLHRCI ROAD KING CLASSIC F/I 88 CI - w/Delphi Fuel Injection
1999 HARLEY DAVIDSON FLTRI ROAD GLIDE F/I 88 CI - w/Delphi Fuel Injection
1999 HARLEY DAVIDSON FLHTCUI ELECTRA GLIDE ULTRA CLASSIC F/I 88 CI - w/Delphi Fuel Injection
1999 HARLEY DAVIDSON FLHTCI ELECTRA GLIDE CLASSIC F/I 88 CI - w/Delphi Fuel Injection
1999 HARLEY DAVIDSON FLHRCI ROAD KING CLASSIC F/I 88 CI - w/Delphi Fuel Injection

Not legal for sale or use on any pollution controlled motor vehicle in California or states adopting California emission procedures. See knfilters.com for CARB status on each part for a specific vehicle.

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K&N Engineering in Riverside California is the world's leading manufacturer of washable performance air filters and air intake systems. K&N invented the reusable high flow cotton air filter in 1969 and has been perfecting the technology ever since. K&N is a world class filtration company selling air filters, oil filters, and intakes in over 50 countries. K&N sells over 5,000 products designed for cars, trucks, motorcycles, engines, and industrial applications. From their Million Mile Warranty to their Consumer Protection Pledge, K&N stands behind their products and their consumers 100%. The distinctive K&N logo represents performance from one of the original performance companies. For more information, visit knfilters.com.