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Custom Assemblies > Intake System-Harley Davidson

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RK-3929
 
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K&N's Sportster RK Series Air Cleaner will get more horsepower from your Harley Davidson Sportster motorcycle. This complete assembly fits inside the stock air cleaner cover, and provides a significant increase in airflow.

[More Information on High-Flow Air Intake for Harley-Davidson Motorcycles]
  • Increases power
  • Washable and reusable
  • Provides increased air flow
  • Fits inside stock cover
Available Information
Installation Instruction Sheet
RK-3929 Vehicle Applications
Dyno Chart - 2008 Harley Davidson Sportster Custom 883 4.4HP
Dyno Chart - 2009 Harley Davidson Sportster 1200 Nightster 7.81HP
News Story - Harley Davidson Sportster® Motorcycles Add Performance with K&N Custom Intake Assembly
News Story - Replacement Filter for K&N's RK-3929 Air Assembly Kit Now Available


Part RK-3929 Product Specifications
Product Style: Motorcycle Intake System
Estimated Horsepower Gain: 4.4 HP @ 5497 RPM
Street Legal In All US States: See Application Link Below
Air Filter Color: Red
TUV Approved (Europe): No
Air Filter Height: 2.25 in (57 mm)
Air Filter Material: Cotton Gauze
Air Filter Outlet Shape: Not Flanged
Air Filter Shape: Oval
Clamp Material: No Clamps Required
Clamp Style: No Clamps Required
Color: Red
Filter Material: Cotton Gauze
Inlet Diameter: 2.458 in (62 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: 2.458 in (62 mm)
Overall Height: 2.5 in (64 mm)
Replacement Filter: E-3040
Size: 10-12
Style: Oval
Top Material/Finish: Aluminum
Top Style: Metal
Vacuum Tubing Included: No
Total Height: 2.5 in (64 mm)
Weight: 3.1 lb (1.4 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.


Customer Feedback      Be the first to review part RK-3929

All of my vehicles including my Harley Davidson have K&N Filters installed. They perform without equal.
Robert W.Garcia Sr., Paradise, Texas
I have used K&N products for several years as a ship's engineer. I am now retired and still own the 1988 Harley Davidson FLST I bought new in '87. I also am still using one of the first Screamin Eagle CV carbs. No one makes the correct air filter, so I went back home to K&N for a universal filter that I knew would not only deliver the air flow necessary but would look good as well.
John Sayers, Lecanto, Florida
I installed the RF-1020 on my new (at the time) 2005 F-350 Harley Davidson Edition with the 6.0 diesel. The fuel mileage went up by 1.5 miles per gallon after installing the kit. Now with 352,500 miles on the truck it averages 19 MPG on the highway and still has the original RF-1020 on it. I clean and oil the filter regularly and I expect it to last forever. The chrome cover fell off the filter almost immediately but that didn't seem to make difference in performance. Thank you for a great product!
Thomas Campbell, Clearwater, Florida