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RK-3954B
$244.99 USD
MSRP $427.39 42.7% Off
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K&N RK-3954B Intake System-Harley Davidson

Custom Assemblies > Intake System-Harley Davidson
  • Designed for Harley-Davidson motorcycles
  • Increase horsepower and torque
  • Easy to install
  • Made in USA
  • Backed by K&N warranty
The K&N RK-3954B 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’s Street Metal Series High-Flow Air Intake Systems provide attractive styling, offer increased airflow and deliver more horsepower & torque to your Harley-Davidson motorcycle. These air intake systems eliminate the stock OE air cleaner and replace it with a complete high-flow air intake system to increase power. The sturdy, custom aluminum backing plate mounts directly to the throttle body via an aluminum integrated, internal-run breather system. The air intake system comes with a K&N Air Filter for high air flow and long service intervals. The K&N air filter is washable, reusable, pre-oiled and ready for installation. To help absorb vibration, a durable mounting gasket is also included. The versatile all-black, durable round aluminum cover and back plate on this air intake can be dressed up for the mean machine, or dressed down for the sleek and sophisticated aesthetic.

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

Product Specifications

Estimated Horsepower Gain7.17 HP @ 4812 RPM
Replacement FilterE-3990
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Warranty3 Months
Product StyleMotorcycle Intake System
Air Filter Height2.125 in (54 mm)
CARB EO NumberD-269-60
Street Legal In All US StatesSee Application Link Above
TUV Approved (Europe)No
Overall Height2.281 in (58 mm)
Top MaterialAluminum
Weight3.8 lb (1.7 kg)
Product Box Height4.88 in (124 mm)
Product Box Length11.75 in (298 mm)
Product Box Width9.5 in (241 mm)
Mounting Hardware IncludedYes
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N RK-3954B Intake System-Harley Davidson Product Reviews