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K&N RK-3934 4.5 out of 5 stars 2 Customer Reviews
Custom Assemblies > Intake System-Harley Davidson

 List Price: $491.92
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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]
  • Designed for Harley-Davidson motorcycles
  • Increase horsepower and torque
  • Easy to install
  • Made in USA
  • Backed by K&N warranty
Available Information
Installation Instruction Sheet
RK-3934 Vehicle Applications
Dyno Chart - 2010 Harley Davidson Fat Bob 96ci - 10.23HP Increase
News Story - More Power and Looks for Your Harley Davidson Twin Cam with K&N Street Metal Air Intake

Part RK-3934 Product Specifications
Product Style: Motorcycle Intake System
Estimated Horsepower Gain: 10.23 HP @ 5155 RPM
Street Legal In All US States: No
Air Filter Color: Red
TUV Approved (Europe): No
Air Filter Height: 2.25 in (57 mm)
Air Filter Inside Diameter: 6.125 in (156 mm)
Air Filter Material: Cotton Gauze
Air Filter Outlet Shape: Not Flanged
Air Filter Shape: Round
Clamp Material: No Clamps Required
Clamp Style: No Clamps Required
Color: Red
Filter Material: Cotton Gauze
Inlet Diameter: 2.4 in (61 mm)
Intake Pipe Ports: All intake tube ports needed for the specified applications are included
Mass Air Flow Sensor Adapter Included: Mass Air Flow Sensor Adapter Included When Required
Mounting Hardware Included: Yes
Neck Flange: 2.4 in (61 mm)
Overall Height: 2.5 in (64 mm)
Replacement Filter: E-3336
Size: 6-8
Style: Round
Top Material/Finish: Chrome
Top Style: Chrome
Vacuum Tubing Included: No
California Restricted: Not legal for sale or use in California
Weight: 4.8 lb (2.2 kg)
Product Box Length: 11.75 in (298 mm)
Product Box Width: 9.5 in (241 mm)
Product Box Height: 4.88 in (124 mm)

Horsepower gains based on similar vehicle dynamometer test. Results will vary.

Product Reviews      Review 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, UK
 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.
mike, Addison, Texas