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K&N RK-3934 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   4.8 out of 5 stars   5 Customer Reviews
  • Designed for Harley-Davidson motorcycles
  • Increase horsepower and torque
  • Easy to install
  • Made in USA
  • Backed by K&N warranty
K&N’s Street Metal Series High-Flow Air Intake Systems provide a good looking appearance, offer increased airflow and deliver more horsepower & torque to your Harley-Davidson motorcycle. These intake systems increase power by eliminating the stock OE air cleaner and replacing it with a complete high-flow air intake system. The sturdy, custom aluminum backing plate mounts directly to the throttle body via an aluminum integrated, internal-run breather system. The intake system comes with a K&N Air Filter for high air flow and long service intervals. A durable mounting gasket is also included to help absorb vibration. The K&N high-flow air filter is washable, reusable, pre-oiled and ready for installation. Simple designed custom covers give this air intake good looks while powering down the highway or at your local show.

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

Product Specifications

Estimated Horsepower Gain10.23 HP @ 5155 RPM
Air Filter ColorRed
Air Filter Height2.25 in (57 mm)
Air Filter Inside Diameter6.125 in (156 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeNot Flanged
Air Filter ShapeRound
CARB EO NumberD-269-55
Clamp MaterialNo Clamps Required
Clamp StyleNo Clamps Required
Clamps IncludedNo Clamps Included
Inlet Diameter2.313 in (59 mm)
Mounting Hardware IncludedYes
Neck Flange2.313 in (59 mm)
Overall Height2.5 in (64 mm)
Product Box Height4.88 in (124 mm)
Product Box Length11.75 in (298 mm)
Product Box Width9.5 in (241 mm)
Product StyleMotorcycle Intake System
Replacement FilterE-3336
Street Legal In All US StatesSee Application Link Above
Top MaterialChrome
Top StyleChrome
TUV Approved (Europe)No
Weight4.8 lb (2.2 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N RK-3934 Intake System-Harley Davidson Product Reviews

Thursday, February 25, 2016 - Part RK-3934
Great product. Easy to install. Worked great with my new (Brand Name) pipes. Definitely noticed an improvement even before I put the pipes on. Looks great as well. I will recommend the RK-3934 to anyone looking to upgrade.

Scott R
Riverside, California
Tuesday, May 26, 2015 - Part RK-3934
Good product.

David Dutton
Wadsworth, Texas
Sunday, January 25, 2015 - Part RK-3934
The RK-3934 arrived with a small but deep scratch on the chrome face plate & I wasn't impressed. However I decided to install it as I had been waiting to get it on the bike & did not want to waste more time returning it as damaged stock. That's the only sorry part. The build & quality is supperb. & my 2013 softtail is a much happier bike. A great product guys I hope K&N stick with making strong durable products. 'm happy to pay for quality & trouble free products.IM VERY HAPPY.

Monday, September 1, 2014 - Part RK-3934
Love this filter. Great build quality, fantastic looks and the 6th gear on my 88ci has gone from overdrive to a fully useable gear with clean, two up acceleration from 60mph onwards. It does stick out more than the stock a/c but barely notice that with mid controls. Praise where it's due.

Ste B.
Manchester, United Kingdom
Monday, November 25, 2013 - Part RK-3934
Does a great job of letting air in to the motor, but does stick out a lot more than the stock air filter and gets in the way when trying to get to the rear brake.

Addison, Texas