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K&N RK-3955 Intake System-Harley Davidson

Custom Assemblies > Intake System-Harley Davidson
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Cast aluminum high-volume, performance air intake housing
  • 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-3955 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 Dyna, Softail, Touring and Twin-Cam Model motorcycles increase power by eliminating the restrictive stock OE air cleaner and replacing it with an oversized K&N High-Flow Air Filter™ and a cast aluminum high-volume aluminum housing. K&N high-flow intake systems give your Harley® an aggressive appearance while providing a significant increase in airflow resulting in more power.

[RK Series Street Metal High Flow Air Intakes for Harley-Davidson Motorcycles]

Product Specifications

Estimated Horsepower Gain3.33 HP @ 4710 RPM
Replacement FilterE-3987
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Warranty3 Months
Product StyleMotorcycle Intake System
Air Filter Height2.469 in (63 mm)
Street Legal In All US States No
TUV Approved (Europe)No
Overall Height3.25 in (83 mm)
Top MaterialBlack Powder Coated
Package Contents1 Air Filter
Weight5 lb (2.2 kg)
Product Box Height9.5 in (241 mm)
Product Box Length11.9 in (302 mm)
Product Box Width4.8 in (122 mm)
California RestrictedNot legal for sale or use in California
Mounting Hardware IncludedYes
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N RK-3955 Intake System-Harley Davidson Product Reviews