Free cookie consent management tool by TermsFeedUpdate cookies preferencesK&N Cold Air Intake Kit: High Performance, Guaranteed to Increase Horsepower: Fits 2001-2017 HARLEY DAVIDSON (Street Bob, Fat Bob, Low Rider, Wide Glide, Switchback, other select models)57-1125P - H Touring Bikes
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K&N Cold Air Intake Kit: High Performance, Guaranteed to Increase Horsepower: Fits 2001-2017 HARLEY DAVIDSON (Street Bob, Fat Bob, Low Rider, Wide Glide, Switchback, other select models)57-1125P

K&N Cold Air Intake Kit: High Performance, Guaranteed to Increase Horsepower: Fits 2001-2017 HARLEY DAVIDSON (Street Bob, Fat Bob, Low Rider, Wide Glide, Switchback, other select models)57-1125P
Price: $299.99 - $242.49
(as of May 16, 2025 02:50:19 UTC – Details)



K&N is the inventor of the Air Intake System and has over 50 years of experience in the performance filtration industry. Proudly designed and manufactured in the USA, this premium cold air intake system is specifically designed for your vehicle and is dyno tested to provide a guaranteed increase in horsepower. It features a high flow intake tube, custom heat shield, and oversized K&N Washable High-Flow Cotton Air Filter for ultimate airflow. This Intake system replaces the restrictive OEM air box to provide an improved driving experience for daily driving or towing. It installs easily in about 60 minutes and is backed by a No-Hassle Lifetime Limited Warranty and will not void your factory warranty. Legal for use in all 50 states.

Compatible Vehicles:

  • 2007-2017 HARLEY DAVIDSON FXDB Street Bob
  • 2008-2017 HARLEY DAVIDSON FXDF Fat Bob
  • 2007-2017 HARLEY DAVIDSON FXDL Dyna Low Rider
  • 2014-2017 HARLEY DAVIDSON FXDL Low Rider
  • 2007-2017 HARLEY DAVIDSON FXDWG Dyna Wide Glide
  • 2012-2016 HARLEY DAVIDSON FLD Switchback
  • 2012-2015 HARLEY DAVIDSON FLS Softail Slim
  • 2007-2015 HARLEY DAVIDSON FLSTC Heritage Softail Classic
  • 2007-2015 HARLEY DAVIDSON FLSTF Fat Boy
  • 2010-2015 HARLEY DAVIDSON FLSTFB Softail Fat Boy Lo
  • 2007-2015 HARLEY DAVIDSON FLSTN Softail Deluxe
  • 2014-2015 HARLEY DAVIDSON FXSB Breakout
  • 2007-2014 HARLEY DAVIDSON FXDC Super Glide Custom
  • 2011-2013 HARLEY DAVIDSON FXS Blackline
  • 2008-2011 HARLEY DAVIDSON FLSTSB Softail Cross Bones
  • 2008-2011 HARLEY DAVIDSON FXCWC Rocker C
  • 2007-2010 HARLEY DAVIDSON FXD Dyna Super Glide
  • 2007-2010 HARLEY DAVIDSON FXSTB Night Train
  • 2007-2010 HARLEY DAVIDSON FXSTC Softail Custom
  • 2008-2009 HARLEY DAVIDSON FXCW Rocker
  • 2007-2009 HARLEY DAVIDSON FXST Softail Standard
  • 2007 HARLEY DAVIDSON FLHR Road King
  • 2007 HARLEY DAVIDSON FLHRC Road King Classic
  • 2007 HARLEY DAVIDSON FLHRS Road King Custom
  • 2007 HARLEY DAVIDSON FLHT Electra Glide Standard
  • 2007 HARLEY DAVIDSON FLHTC Electra Glide Classic
  • 2007 HARLEY DAVIDSON FLHTCU Ultra Classic Electra Glide
  • 2007 HARLEY DAVIDSON FLHX Street Glide
  • 2007 HARLEY DAVIDSON FLSTSC Softail Springer Classic
  • 2007 HARLEY DAVIDSON FLTR Road Glide
  • 2007 HARLEY DAVIDSON FXSTD Softail Deuce
  • 2002-2006 HARLEY DAVIDSON FLHRCI Road King Classic F/I
  • 2003-2006 HARLEY DAVIDSON FLHRI Road King F/I
  • 2004-2006 HARLEY DAVIDSON FLHRSI Road King Custom F/I
  • 2002-2006 HARLEY DAVIDSON FLHTCI Electra Glide Classic F/I
  • 2002-2006 HARLEY DAVIDSON FLHTCUI Electra Glide Ultra Classic F/I
  • 2003-2006 HARLEY DAVIDSON FLHTI Electra Glide Standard F/I
  • 2006 HARLEY DAVIDSON FLHXI Street Glide F/I
  • 2002-2006 HARLEY DAVIDSON FLSTCI Heritage Softail Classic F/I
  • 2001-2006 HARLEY DAVIDSON FLSTFI Fat Boy F/I
  • 2006 HARLEY DAVIDSON FLSTI Heritage Softail F/I
  • 2005-2006 HARLEY DAVIDSON FLSTNI Softail Deluxe F/I
  • 2005-2006 HARLEY DAVIDSON FLSTSCI Softail Springer Classic F/I
  • 2002-2006 HARLEY DAVIDSON FLTRI Road Glide F/I
  • 2006 HARLEY DAVIDSON FXDBI Street Bob F/I
  • 2005-2006 HARLEY DAVIDSON FXDCI Dyna Super Glide Custom F/I
  • 2004-2006 HARLEY DAVIDSON FXDI Dyna Super Glide F/I
  • 2006 HARLEY DAVIDSON FXDI35 35th Anniv. Super Glide F/I
  • 2004-2006 HARLEY DAVIDSON FXDLI Dyna Low Rider F/I
  • 2004-2006 HARLEY DAVIDSON FXDWGI Dyna Wide Glide F/I
  • 2001-2006 HARLEY DAVIDSON FXSTBI Night Train F/I
  • 2001-2006 HARLEY DAVIDSON FXSTDI Softail Deuce F/I
  • 2001-2006 HARLEY DAVIDSON FXSTI Softail Standard F/I
  • 2001-2006 HARLEY DAVIDSON FXSTSI Springer Softail F/I
  • 2004-2005 HARLEY DAVIDSON FXDXI Dyna Super Glide Sport F/I
  • 2001-2003 HARLEY DAVIDSON FLSTSI Heritage Springer F/I

ULTIMATE LONGEVITY: 10-Year/Million Mile Limited Warranty protects for the life of your vehicle.
GUARANTEED INCREASE IN HORSEPOWER: Dyno-tested with up to 50% more airflow than restrictive factory box air filter and intake tube
BETTER TOWING: Improves acceleration and uphill performance when towing by improving throttle response.
IMPROVED ENGINE SOUND: Hear the power under the hood.
WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants
EASY MAINTENANCE: No filter cleaning required for up to 100,000 miles
EASY TO INSTALL: Bolt-on power in less than an hour with basic hand tools. K&N air intake systems are one of the easiest ways to guarantee an increase in horsepower.
DYNO TESTED: Dyno-tested for a guaranteed increase in horsepower and acceleration with no ECU tune required
HIGH QUALITY: Made in America.
RACETRACK APPROVED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle.

Customers say

Customers find the air intake kit easy to install and say it performs great. They like how it looks. The quality receives mixed feedback, with some customers describing it as very good while others find it poor.

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