RK-3951 K&N Intake System-Harley Davidson

$346.99
In stock / Free Shipping
SKU
RK-3951
Locate a Dealer
Intake System-Harley Davidson
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 black housing with silver details and sanded fins. Internal breathers provide a sleek, clean appearance. This air intake has a classic styling with a savage appeal.
  • 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
Estimated Horsepower Gain6.04 HP @ 4907 RPM
Replacement FilterE-3987
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Warranty1,000,000 Miles/10 Year
Product StyleMotorcycle Intake System
Air Filter Height2.469 in (63 mm)
CARB EO NumberD-269-59
Street Legal In All US StatesSee Vehicle Applications
TUV Approved (Europe)No
Overall Height3.25 in (83 mm)
Top MaterialBlack Powder Coated
Package Contents1 Air Filter
Package Quantity1
Weight5 lb (2.3 kg)
Product Box Height4.8 in (122 mm)
Product Box Length12 in (305 mm)
Product Box Width9.5 in (241 mm)
Housing MaterialAluminum
Mounting Hardware IncludedYes
No cross references found for this part

Warning: Cancer & Reproductive Harm – P65Warnings.ca.gov

K&N Products

Unmatched Performance

50 years of improving vehicle performance.

intake

Cold Air Intakes

Custom-engineered tubes deliver better airflow than you get with a stock intake. More air means better performance.

air filters

Air Filters

Using cotton gauze instead of typical folded paper, our filters increase airflow while providing excellent engine protection.

cabin air filter

Cabin Air Filters

Helps capture most mold, mildew, fungus, spores, bacteria, germs, pollen and allergens, and helps to rid the air of unpleasant odors.

oil filters

Oil Filters

K&N oil filters use a high flow filter media that allows for high flow rates while providing outstanding engine protection.

tuning

Speed Shop

From custom air filters to fuel pumps and carb accessories, the K&N Speed Shop has been assembled to help your vehicle run at peak performance.

hvac

Home Air Filters

New washable and reusable air conditioning and furnace filters for your home. From the industry leader in washable automotive filtration.

filter

FUEL FILTERS

cleaning

CLEANING KITS

diesel filter

HD DIESEL

powersports

POWERSPORTS

Our Story

Why K&N?

We're #1 for a reason. Since 1969 every product we've created delivers high-performance, unmatched quality and longevity

Write Your Own Review
Leave a review for:RK-3951 K&N Intake System-Harley Davidson
Your Rating

WELCOME TO THE WORLD OF #KNFILTERS

Chat Now Chat Now