K&N Performance Air Intake RK-3946B is the Power Solution for Your Harley® FL

RK-3946B intake assembled

The RK-3946B intake is simple to install and offers up guaranteed power gains

So you have your own tools and enjoy wrenching on your Harley? Congratulations, you just passed every test required to install K&N’s high performance RK-3946B intake to your late model Harley-Davidson® FL model. Typically it takes 90 minutes or less for a handy rider to bolt on this great looking intake and its impressive power gains.

Yes, you’ll appreciate K&N’s crystal clear instruction sheet that includes a series of photos that leaves nothing in the process to the imagination. However, what you’ll appreciate even more is the pleasure you’ll experience the first time you feel the guaranteed performance increase that the RK-3946B will breathe into your Road King or Glide.

RK-3946B installed on a Harley

The intake's powder coated cover is a great styling match for the Harley V-twin

Want an example of that performance gain? When bolted to a stock 103 CI 2015 Street Glide, the RK-3946B intake showed an estimated gain of over 7.5 horsepower on K&N’s dynamometer. Even more impressively, the Street Glide’s torque numbers revealed an estimated increase of almost 9 foot-pounds. That combination of an increase in horsepower and torque will make for exciting throttle response, faster off-the-line power, and arm-stretching roll-on acceleration.

The added bonus in bolting on the RK-3946B is the clean and mean look that the intake adds to the V-twin power-plant. K&N’s designers and engineers outdid themselves developing the custom aluminum backing plate that mounts directly to the throttle body via an aluminum internal-run breather system. To cap the intake off, the black powder coated filter cover is a subtle, all-business focal-point.

RK-3946B intake parts

The K&N RK-3946B comes with clear and easy-to-follow instructions

Sandwiched between that mounting plate and cover is one of the legendary K&N high-flow, reusable air filters. The filter’s cotton gauze media not only allows maximum airflow, but the oil impregnated fibers make for an extremely effective filtration system. When it’s time to wash the filter in the RK-3946B intake, the process is simple using the 99-5000 filter service kit. The kit includes the cleaning fluid and re-oiling spray that will get you back on the road quickly.

If your Harley is on the list below, the American-made RK-3946B is a no-brainer as your next performance and style accessory.

The K&N RK-3946B fits the following Harley-Davidson models:

2015 HARLEY DAVIDSON FLTRXS ROAD GLIDE SPECIAL 103 CI - All Models
2015 HARLEY DAVIDSON FLTRX ROAD GLIDE 103 CI - All Models
2015 HARLEY DAVIDSON FLRT FREEWHEELER 103 CI - All Models
2015 HARLEY DAVIDSON FLHXS STREET GLIDE SPECIAL 103 CI - All Models
2015 HARLEY DAVIDSON FLHX STREET GLIDE 103 CI - All Models
2015 HARLEY DAVIDSON FLHTKL ULTRA LIMITED LOW 103 CI - All Models
2015 HARLEY DAVIDSON FLHTK ULTRA LIMITED 103 CI - All Models
2015 HARLEY DAVIDSON FLHTCUTG TRI GLIDE ULTRA 103 CI - All Models
2015 HARLEY DAVIDSON FLHTCUL ELECTRA GLIDE ULTRA CLASSIC LOW 103 CI - All Models
2015 HARLEY DAVIDSON FLHTCU ELECTRA GLIDE ULTRA CLASSIC 103 CI - All Models
2015 HARLEY DAVIDSON FLHR ROAD KING 103 CI - All Models
2014 HARLEY DAVIDSON FLHX STREET GLIDE 103 CI - All Models
2014 HARLEY DAVIDSON FLHTK ELECTRA GLIDE ULTRA LIMITED 103 CI - All Models
2014 HARLEY DAVIDSON FLHTCUTG TRI GLIDE ULTRA 103 CI - All Models
2014 HARLEY DAVIDSON FLHTCU ELECTRA GLIDE ULTRA CLASSIC 103 CI - All Models
2014 HARLEY DAVIDSON FLHR ROAD KING 103 CI - All Models
2013 HARLEY DAVIDSON FLTRX ROAD GLIDE CUSTOM 103 CI - All Models
2013 HARLEY DAVIDSON FLTRU ROAD GLIDE ULTRA 103 CI - All Models
2013 HARLEY DAVIDSON FLHX STREET GLIDE 103 CI - All Models
2013 HARLEY DAVIDSON FLHTK ELECTRA GLIDE ULTRA LIMITED 103 CI - All Models
2013 HARLEY DAVIDSON FLHTCUTG TRI GLIDE ULTRA CLASSIC 103 CI - All Models
2013 HARLEY DAVIDSON FLHTCU ULTRA CLASSIC ELECTRA GLIDE 103 CI - All Models
2013 HARLEY DAVIDSON FLHTC ELECTRA GLIDE CLASSIC 103 CI - All Models
2013 HARLEY DAVIDSON FLHRC ROAD KING CLASSIC 103 CI - All Models
2013 HARLEY DAVIDSON FLHR ROAD KING 103 CI - All Models
2012 HARLEY DAVIDSON FLTRX ROAD GLIDE CUSTOM 103 CI - All Models
2012 HARLEY DAVIDSON FLTRU ROAD GLIDE ULTRA 103 CI - All Models
2012 HARLEY DAVIDSON FLHX STREET GLIDE 103 CI - All Models
2012 HARLEY DAVIDSON FLHTK ELECTRA GLIDE ULTRA LIMITED 103 CI - All Models
2012 HARLEY DAVIDSON FLHTCUTG TRI GLIDE ULTRA CLASSIC 103 CI - All Models
2012 HARLEY DAVIDSON FLHTCU ELECTRA GLIDE ULTRA CLASSIC 103 CI - All Models
2012 HARLEY DAVIDSON FLHTC ELECTRA GLIDE CLASSIC 103 CI - All Models
2012 HARLEY DAVIDSON FLHRC ROAD KING CLASSIC 103 CI - All Models
2012 HARLEY DAVIDSON FLHR ROAD KING 103 CI - All Models
2011 HARLEY DAVIDSON FLTRX ROAD GLIDE CUSTOM 96 CI - All Models
2011 HARLEY DAVIDSON FLTRU ROAD GLIDE ULTRA 103 CI - All Models
2011 HARLEY DAVIDSON FLHXXX STREET GLIDE TRIKE 103 CI - All Models
2011 HARLEY DAVIDSON FLHX STREET GLIDE 96 CI - All Models
2011 HARLEY DAVIDSON FLHTP ELECTRA GLIDE POLICE 103 CI - All Models
2011 HARLEY DAVIDSON FLHTK ELECTRA GLIDE ULTRA LIMITED 103 CI - All Models
2011 HARLEY DAVIDSON FLHTCUTG TRI GLIDE ULTRA CLASSIC 103 CI - All Models
2011 HARLEY DAVIDSON FLHTCU ULTRA CLASSIC ELECTRA GLIDE 96 CI - All Models
2011 HARLEY DAVIDSON FLHTC ELECTRA GLIDE CLASSIC 96 CI - All Models
2011 HARLEY DAVIDSON FLHRC ROAD KING CLASSIC 103 CI - All Models
2011 HARLEY DAVIDSON FLHR ROAD KING 96 CI - All Models
2011 HARLEY DAVIDSON FLHP ROAD KING POLICE 103 CI - All Models
2010 HARLEY DAVIDSON FLTRX ROAD GLIDE CUSTOM 96 CI - All Models
2010 HARLEY DAVIDSON FLHXXX STREET GLIDE TRIKE 103 CI - All Models
2010 HARLEY DAVIDSON FLHX STREET GLIDE 96 CI - All Models
2010 HARLEY DAVIDSON FLHTP ELECTRA GLIDE POLICE 103 CI - All Models
2010 HARLEY DAVIDSON FLHTK ELECTRA GLIDE ULTRA LIMITED 103 CI - All Models
2010 HARLEY DAVIDSON FLHTCUTG TRI GLIDE ULTRA CLASSIC 103 CI - All Models
2010 HARLEY DAVIDSON FLHTCU ULTRA CLASSIC ELECTRA GLIDE 96 CI - All Models
2010 HARLEY DAVIDSON FLHTC ELECTRA GLIDE CLASSIC 96 CI - All Models
2010 HARLEY DAVIDSON FLHRC ROAD KING CLASSIC 96 CI - All Models
2010 HARLEY DAVIDSON FLHR ROAD KING 96 CI - All Models
2010 HARLEY DAVIDSON FLHP ROAD KING POLICE 103 CI - All Models
2009 HARLEY DAVIDSON FLTR ROAD GLIDE 96 CI - All Models
2009 HARLEY DAVIDSON FLHX STREET GLIDE 96 CI - All Models
2009 HARLEY DAVIDSON FLHTP ELECTRA GLIDE POLICE 103 CI - All Models
2009 HARLEY DAVIDSON FLHTCUTG TRI GLIDE ULTRA CLASSIC 103 CI - All Models
2009 HARLEY DAVIDSON FLHTCU ULTRA CLASSIC ELECTRA GLIDE 96 CI - All Models
2009 HARLEY DAVIDSON FLHTC ELECTRA GLIDE CLASSIC 96 CI - All Models
2009 HARLEY DAVIDSON FLHT ELECTRA GLIDE STANDARD 96 CI - All Models
2009 HARLEY DAVIDSON FLHRC ROAD KING CLASSIC 96 CI - All Models
2009 HARLEY DAVIDSON FLHR ROAD KING 96 CI - All Models
2009 HARLEY DAVIDSON FLHP ROAD KING POLICE 103 CI - All Models
2008 HARLEY DAVIDSON FLTR ROAD GLIDE 96 CI - All Models
2008 HARLEY DAVIDSON FLHX STREET GLIDE 96 CI - All Models
2008 HARLEY DAVIDSON FLHTCU ULTRA CLASSIC ELECTRA GLIDE 96 CI - All Models
2008 HARLEY DAVIDSON FLHTC ELECTRA GLIDE CLASSIC 96 CI - All Models
2008 HARLEY DAVIDSON FLHT ELECTRA GLIDE STANDARD 96 CI - All Models
2008 HARLEY DAVIDSON FLHRC ROAD KING CLASSIC 96 CI - All Models
2008 HARLEY DAVIDSON FLHR ROAD KING 96 CI - All Models

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