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Custom Assemblies > Intake System-Harley Davidson

 List Price: $243.00
Your Price: $145.99

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RK-3904
 
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K&N air cleaner assemblies, designed for your Harley-Davidson®, are a remarkable combination of performance and style. They are machined from billet aluminum, luster polished, then chrome plated to complement your show bike. These K&N custom air cleaners fit all touring models. Each K&N air cleaner comes complete and ready to use, including mounting bracket kit with nothing else to buy.
  • Designed to increase horsepower & torque
  • Washable and reusable
  • Attractive custom look
  • Chrome plated cover
Available Information
Installation Instruction Sheet
RK-3904 Vehicle Applications


Part RK-3904 Product Specifications
Product Style: Motorcycle Intake System
Street Legal In All US States: No
Air Filter Color: Red
TUV Approved (Europe): No
Air Filter Height: 2.188 in (56 mm)
Air Filter Inside Diameter: 5.25 in (133 mm)
Air Filter Material: Cotton Gauze
Air Filter Outlet Shape: Not Flanged
Air Filter Shape: Teardrop
Clamp Material: No Clamps Required
Clamp Style: No Clamps Required
Color: Red
Filter Material: Cotton Gauze
Inlet Diameter: 2.25 in (57 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: 2.25 in (57 mm)
Overall Height: 2.5 in (64 mm)
Replacement Filter: E-3333
Size: 10-12
Style: Oval
Top Material/Finish: Chrome
Top Style: Chrome
Vacuum Tubing Included: No
California Restricted: Not legal for sale or use in California
Total Height: 2.5 in (64 mm)
Weight: 4.8 lb (2.2 kg)
Product Box Length: 11.56 in (294 mm)
Product Box Width: 9.5 in (241 mm)
Product Box Height: 4.5 in (114 mm)



Customer Feedback      Be the first to review part RK-3904

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
Since installing the K&N intake system on my 2003 Harley Davidson Fat Boy, I have noticed considerable increase in power. My Harley is the 2003 100 Year Anniversary edition and I have several anniversary parts on it, including the breather cover. With this K&N kit, I was able to maintain the use of all specialty features. The kit was very easy to install. I had it completely installed in less than 30 minutes. Thanks again and I look forward to doing more business with you in the future.
Kevin Bearden, Ocala, Florida