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K&N

K&N Cold Air Intake Kit: High Performance, Increase Horsepower, 57-1137

  • Based on 164 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Oct 26
Order within 17 hours and 6 minutes
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Style: Black


Features

  • Increased Horsepower: Guaranteed to increase horsepower, helping unlock greater performance from your engine.
  • Enhanced Driving Experience: Improves throttle response and improved engine sound.
  • Premium Construction: Built with premium intake materials and a durable, high-quality finish designed for lasting performance.
  • Washable & Reusable Air Filter: Includes a High-Flow Air Filter that can go up to 100,000 miles before cleaning under normal highway driving conditions.

Description

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.Compatible Vehicles:2016-2017 HARLEY DAVIDSON FXDF Fat Bob2007-2017 HARLEY DAVIDSON FXDL Dyna Low Rider2014-2017 HARLEY DAVIDSON FXDL Low Rider2007-2017 HARLEY DAVIDSON FXDWG Dyna Wide Glide2012-2016 HARLEY DAVIDSON FLD Switchback2012-2015 HARLEY DAVIDSON FLS Softail Slim2007-2015 HARLEY DAVIDSON FLSTC Heritage Softail Classic2007-2015 HARLEY DAVIDSON FLSTF Fat Boy2010-2015 HARLEY DAVIDSON FLSTFB Softail Fat Boy Lo2007-2015 HARLEY DAVIDSON FLSTN Softail Deluxe2014-2015 HARLEY DAVIDSON FXSB Breakout2007-2014 HARLEY DAVIDSON FXDC Super Glide Custom2011-2013 HARLEY DAVIDSON FXS Blackline2007-2012 HARLEY DAVIDSON FXDB Street Bob2008-2011 HARLEY DAVIDSON FLSTSB Softail Cross Bones2008-2011 HARLEY DAVIDSON FXCWC Rocker C2007-2010 HARLEY DAVIDSON FXD Dyna Super Glide2007-2010 HARLEY DAVIDSON FXSTB Night Train2007-2010 HARLEY DAVIDSON FXSTC Softail Custom2008-2009 HARLEY DAVIDSON FXCW Rocker2007-2009 HARLEY DAVIDSON FXST Softail Standard2007 HARLEY DAVIDSON FLHR Road King2007 HARLEY DAVIDSON FLHRC Road King Classic2007 HARLEY DAVIDSON FLHRS Road King Custom2007 HARLEY DAVIDSON FLHT Electra Glide Standard2007 HARLEY DAVIDSON FLHTC Electra Glide Classic2007 HARLEY DAVIDSON FLHTCU Ultra Classic Electra Glide2007 HARLEY DAVIDSON FLHX Street Glide2007 HARLEY DAVIDSON FLSTSC Softail Springer Classic2007 HARLEY DAVIDSON FLTR Road Glide2007 HARLEY DAVIDSON FXSTD Softail Deuce2002-2006 HARLEY DAVIDSON FLHRCI Road King Classic F/I2003-2006 HARLEY DAVIDSON FLHRI Road King F/I2004-2006 HARLEY DAVIDSON FLHRSI Road King Custom F/I2002-2006 HARLEY DAVIDSON FLHTCI Electra Glide Classic F/I2002-2006 HARLEY DAVIDSON FLHTCUI Electra Glide Ultra Classic F/I2003-2006 HARLEY DAVIDSON FLHTI Electra Glide Standard F/I2006 HARLEY DAVIDSON FLHXI Street Glide F/I2002-2006 HARLEY DAVIDSON FLSTCI Heritage Softail Classic F/I2001-2006 HARLEY DAVIDSON FLSTFI Fat Boy F/I2006 HARLEY DAVIDSON FLSTI Heritage Softail F/I2005-2006 HARLEY DAVIDSON FLSTNI Softail Deluxe F/I2005-2006 HARLEY DAVIDSON FLSTSCI Softail Springer Classic F/I

Product Grade: Performance Part


Brand: K&N


Fit Type: Vehicle Specific Fit


Product Dimensions: 11.75"L x 9.5"W x 4.88"H


OEM Part Number: 57-1137


Brand Name: K&N


Model Number: 57-1137


OEM Equivalent Part Number: 57-1137


Manufacturer Part Number: 57-1137


Number of Items: 1


Number of Packs: 1


Global Trade Identification Number: 08


Manufacturer: K&N Engineering


Unit Count: 1 Count


UPC: 024844368508


Included Components: Air Filter^Intake Tube^Gasket(2)^Back Plate^Parts Kit^Literature Packet


Item Type Name: Performance Air Intake System


Item Weight: 4.2 pounds


Manufacturer Warranty Description: 1,000,000 Miles/10 Year


Item Dimensions L x W x H: 11.75"L x 9.5"W x 4.88"H


Shape: Oblong


Item Highlight: Fits Select 2001-2017 HARLEY DAVIDSON FLD Switchback/FLHR Road King/FLS Softail Slim (See Product Description)


Product Grade: Performance Part


Fit Type: Vehicle Specific Fit


Automotive Fit Type: Vehicle Specific Fit


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Absolutely awesome looking!
Style: Black
This is a statement piece , big and beastly looking. Easy install, bolted right in no issue, 2008 dyna street bob.
Reviewed in the United States on January 18, 2026 by byron childs

  • Perfect
Style: Black
Works great
Reviewed in the United States on February 22, 2026 by Amazon Customer

  • Great looking bolt on performance.
Style: Black
High quality looks great.Unlike they tell you it was easy to install,just have some silicone handy just to keep gaskets in place when installing.The higher RPM performance is amazing.
Reviewed in the United States on October 24, 2025 by john zapotoczny

  • Good performance
Style: Black
Fits my 03 road king classic just fine. Defiantly could feel a difference in HP and Torq. A little to big for the look im going for but performance wise its great.
Reviewed in the United States on April 3, 2025 by Mac

  • Easy to install.
Style: Black
Didn't Notice any extra house power, in my opinion not worth the money.
Reviewed in the United States on August 20, 2023 by Daniel

  • Fits touring bikes! Kinda...
Style: Black
I went out on a limb to see how this would fit on my 07 Electra, and im not disappointed. You cannot use the filter that comes with the kit unless you have no lower fairings, but that's ok, a quick trip to O'Reilly for a $35 specter stubby air filter with a 4" inlet slips right over the entire housing and gets the job done. Makes a pretty good sound and feeds my 10.8:1cr 107ci Twinkie well. Also is the perfect diameter for a 62mm throttle body opening! Just trim the gasket a little once it's installed for a smooth transition of air. Over all. I'm happy with it. Ps ignore my ratty pipes lol. ... show more
Reviewed in the United States on August 16, 2024 by Chandler

  • Pretty Good
Style: Black
Overall seems to be a pretty good product. I’m gonna take it out on the road tomorrow so we will see Didn’t really add a whole heck of a lot of power just a little bit of throttle response pretty easy to put on.
Reviewed in the United States on June 14, 2024 by Mark Durham

  • Sexy
Style: Black
Adds style and preference
Reviewed in the United States on September 6, 2025 by David Douglas Blache

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