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K&N

Intake System-Harley Davidson

Part Number RK-3951S (101819394)
$314.99
Out of stock
Select vehicle for guaranteed fit

Description

K&N Street Metal Air Intake Systems for Harley Davidson motorcycles replace the restrictive stock OE air cleaner with an oversized K&N High-Flow Air Filter and a high-volume cast aluminum housing. If you're looking for an aggressive appearance but want a significant increase in airflow, resulting in more power, this high-flow air intake system is exactly what your Harley needs. Installation is so simple, it can usually be done in 90 minutes or less. The K&N air filter is washable, reusable, pre-oiled and ready for installation. This intake system features a matte silver housing with polished fins. Internal breathers provide a sleek, clean appearance. This air intake has classic styling with a savage appeal.

Fitment

This part fits the following vehicles.

  • 2008-2009 Harley-Davidson FLHT Electra Glide Standard
  • 2008-2010 Harley-Davidson FLTR Road Glide
  • 2008-2013 Harley-Davidson FLHRC Road King Classic
  • 2008-2013 Harley-Davidson FLHTC Electra Glide Classic
  • 2008-2013 Harley-Davidson FLHTCU Electra Glide Ultra Classic
  • 2008-2016 Harley-Davidson FLHR Road King
  • 2008-2016 Harley-Davidson FLHX Street Glide
  • 2008 Harley-Davidson FLHRSE4 Screamin Eagle Road King
  • 2009-2013 Harley-Davidson FLHTCUTG Tri Glide Ultra Classic
  • 2010-2011 Harley-Davidson FLHXXX Street Glide Trike
  • 2010-2013 Harley-Davidson FLTRX Road Glide Custom
  • 2010 Harley-Davidson FLHTCUSE5 CVO Ultra Classic Electra Glide
  • 2011-2013 Harley-Davidson FLTRU Road Glide Ultra
  • 2011-2014 Harley-Davidson FLHTK Electra Glide Ultra Limited
  • 2014-2016 Harley-Davidson FLHXS Street Glide Special
  • 2015-2016 Harley-Davidson FLHTKL Ultra Limited Low
  • 2015-2016 Harley-Davidson FLHTK Ultra Limited
  • 2015-2016 Harley-Davidson FLRT Freewheeler
  • 2015-2016 Harley-Davidson FLTRX Road Glide
  • 2015-2016 Harley-Davidson FLTRXS Road Glide Special
  • 2016-2017 Harley-Davidson FLS Softail Slim
  • 2016-2017 Harley-Davidson FLSS Softail Slim S
  • 2016-2017 Harley-Davidson FLSTC Heritage Softail Classic
  • 2016-2017 Harley-Davidson FLSTFB Fat Boy Lo
  • 2016-2017 Harley-Davidson FLSTFBS Fat Boy S
  • 2016-2017 Harley-Davidson FLSTF Fat Boy
  • 2016-2017 Harley-Davidson FLSTN Softail Deluxe
  • 2016-2017 Harley-Davidson FXSB Breakout

Features & benefits

  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Cast aluminum high-volume, performance air intake housing in silver
  • Washable and reusable K&N High-Flow cotton air filter that provides outstanding performance and protection
  • Integrated internal velocity stack
  • Built-in breathers replace external OE breathers
  • Easy to install, usually in 90 minutes or less
  • Direct replacement - this engine air filter assembly is designed to match the performance of an original equipment filter box on specified vehicles
  • Restores performance - engineered to provide a tight seal that keeps out moisture and debris to help protect the air filter when a factory assembly is cracked, warped or missing
  • Durable construction - designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality - backed by a team of product experts in the United States and more than a century of automotive experience
  • Associated products: E-3987 Custom Air Filter, 99-5000 Filter Care Service Kit Aerosol

Specifications

Air Filter Color Red
Air Filter Height 2.469 in (63 mm)
Air Filter Material Cotton Gauze
Air Filter Washable Yes
CARB EO Number D-269-59
Color / Finish Red Filter, Silver Housing
Epa Compliant
Estimated Horsepower Gain 6.04 HP @ 4907 RPM
Mounting Hardware Included Yes
Overall Height 3.25 in (83 mm)
Package Material Paperboard
Package Type Box
Product Style Motorcycle Intake System
Replacement Filter E-3987
Street Legal Yes
Street Legal In All US States Not legal for sale or use in California on any pollution controlled motor vehicle. NOTE: Some specific models and years may be legal in CA. Check the CARB status on your parts at knfilters.com.
Top Material Silver Powder Coated
TUV Approved (Europe) No
Weight 4.9 lb (2.2 kg)

Warranty

No-Hassle Lifetime Limited

Videos and guides

Magnuson-Moss Warranty Act

Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)).

California residents

WARNING: This product can expose you to chemicals including nickel, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

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