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Custom Assemblies > Intake System-Harley Davidson

 List Price: $475.06
Your Price: $285.99

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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 Above
Air Filter Color: Red
TUV Approved (Europe): No
Air Filter Height: 2.25 in (57 mm)
Air Filter Inside Diameter: 8.063 in (205 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

Best filters ever. Run them in all my vehicles including my Harley Davidson Motorcycle. Saved a ton of $$$ too by not having to purchase replacement paper filters every time.
Bill Sleeper, Altadena, California
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