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K&N’s RK-3932B Intake Delivers Substantial Performance Gains for Your Harley-Davidson®

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Harley-Davidson dyno chart for RK-3932

The dynamometer doesn’t lie. Here is your performance proof

Okay, so the title got you, but can you trust us when we claim to offer performance gains? In a nutshell, yes! Read on and find out why.

Horsepower and torque numbers can be tricky, even deceptive things. Some companies will claim performance gains from aftermarket accessories without any substantiating evidence. Other companies will offer up specific peak numbers but do so in a way that does not indicate overall performance and ride-ability. Sometimes, a peak horsepower increase can come at the expense of useable power at lower RPM ranges.

At K&N, when we specify a performance gain, we give you the actual dynamometer chart and let you see for yourself. So what about that stock 96 cubic inch 2010 Harley-Davidson® Fat Bob? When we tell you that the K&N RK-3932B intake will deliver approximately 9.8 more horsepower and 9.9 more foot pounds of torque, we give you the proof on paper. Notice how the red K&N line on the dyno chart shows a linear increase across the RPM range in both horsepower and torque. That’s real-world power that you will actually feel and use.

K&N RK-3932B intake system with washable and reusable air filter

Quality and good looks are featured in the RK-3932B intake

Enough about the numbers and the proof - the K&N RK-3932B is a great choice for your Harley® for a number of other reasons as well. The intake mounts easily and cleanly to the throttle body via an aluminum integrated, internal-run breather system. It also features a vibration-absorbing mounting gasket. The intake’s high-flow filter is washable, reusable, pre-oiled and ready for installation. Simply wash and re-oil the filter yearly or more often if conditions warrant it. Using the K&N 99-5000 air filter cleaning kit makes the task simple and effective. That reusability ends up being ultra cost-effective over the life of the motorcycle and it makes perfect sense for the environment.

The RK-3932B intake delivers clean and mean understated styling and also the K&N durability that motorsports enthusiasts have come to expect. The RK street metal series is a favorite of Harley riders for good reason. All of that performance, styling, and reliability come in a package made in the good old USA. Use the K&N search by vehicle tool to get exactly the right part for your ride.

K&N intake system installed on 2006 Harley-Davidson Road King

The intake matches the lines of the V-twin perfectly

The RK-3932B fits the following Harley-Davidson motorcycles:

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


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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.