SHOP FOR YOUR VEHICLE

K&N RK-3956 Intake System-Harley Davidson

Custom Assemblies / Intake System-Harley Davidson
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5     6 Customer Reviews
RK-3956
$233.99 USD
Out of Stock   Will ship as soon as it becomes available.
QTY
Find a Dealer

Product Overview

  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Cast aluminum high-volume, performance air intake housing in black
  • 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
The K&N RK-3956 Intake System-Harley Davidson fits some Harley Davidson FLDE Deluxe, Harley Davidson FLFB Fat Boy, Harley Davidson FLFBS Fat Boy, Harley Davidson FLHC Heritage Classic, Harley Davidson FLHCS Heritage Classic, Harley Davidson FLHR Road King, Harley Davidson FLHRXS Road King Special, Harley Davidson FLHTCU Electra Glide Ultra Classic, Harley Davidson FLHTCUTG Tri Glide Ultra, Harley Davidson FLHTK Ultra Limited, Harley Davidson FLHTKL Ultra Limited Low, Harley Davidson FLHX Street Glide, Harley Davidson FLHXS Street Glide Special, Harley Davidson FLRT Freewheeler, Harley Davidson FLSB Sport Glide, Harley Davidson FLSL Softail Slim, Harley Davidson FLTRU Road Glide Ultra, Harley Davidson FLTRX Road Glide, Harley Davidson FLTRXS Road Glide Special, Harley Davidson FXBB Street Bob, Harley Davidson FXBR Breakout, Harley Davidson FXBRS Breakout, Harley Davidson FXFB Fat Bob, Harley Davidson FXFBS Fat Bob, Harley Davidson FXLR Low Rider, and Harley Davidson FXLR Low Rider Custom models. See vehicle applications link for details.
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 an updated, modern look with an oval-shaped matte black housing. Silver details and sanded fins further enhance the streamlined look. Internal breathers provide a sleek, clean appearance. This air intake has a classic styling with a savage appeal. These K&N air intakes are street legal in most states. They are not legal for use in California and other states adopting California emission standards.

[RK Series Street Metal High Flow Air Intakes for Harley-Davidson Motorcycles]
Estimated Horsepower Gain5.19 HP @ 4981 RPM
Replacement FilterE-3988
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Warranty1,000,000 Miles/10 Year
Product StyleMotorcycle Intake System
Air Filter Height2.406 in (61 mm)
CARB EO NumberD-269-60
Street Legal In All US StatesSee Vehicle Applications
TUV Approved (Europe)No
Overall Height4.25 in (108 mm)
Top MaterialBlack Powder Coated
Package Contents1 Air Filter
Package Quantity1
Weight4.3 lb (1.9 kg)
Product Box Height4.88 in (124 mm)
Product Box Length12 in (305 mm)
Product Box Width9.5 in (241 mm)
Mounting Hardware IncludedYes
Horsepower gains based on similar vehicle dynamometer test. Results will vary.
WARNING: Cancer and reproductive harm--www.P65warnings.ca.gov

K&N RK-3956 Intake System-Harley Davidson Product Reviews

Thursday, April 4, 2019 - Part RK-3956
Put this on my 2018 FXLR and along with some new pipes as well, my bike pulls quicker off the line and is even more fun to ride. Easy install however the throttle body connections have it canted slightly. Its not a lot however.

Charlie Lord
Rochester, New Hampshire
Saturday, March 9, 2019 - Part RK-3956
Easy installation, great value for the response you feel with twisting of the wrist. Paired with Vance and Hines slip on 400 eliminator is music that makes you heart pound with excitement.

William Brady
Albuquerque, New Mexico
Tuesday, February 5, 2019 - Part RK-3956
East to installaatio, great quality.

Tino Veistonen
Turku, Finland