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Custom Assemblies > Intake System-Harley Davidson

 List Price: $261.39
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RK-3931
 
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K&N Air Cleaner Assemblies are designed to get more horsepower from your Harley-Davidson® motorcycle. These air cleaner assemblies replace the stock air filter and backplate with an oversized K&N Air Filter and custom aluminum backing plate. These assemblies utilizes the stock cover to maintain stock appearance. [MORE]
Available Information
Installation Instruction Sheet
Air Filter Test Data
Dyno Chart - 2008 Harley Davidson Dyna Street Bob 6.54HP Increase
News Story - Add 6.5 More Horsepower to Harley Davidson Dyna Models with K&N Custom Intake Assembly
RK-3931 Vehicle Applications


Part RK-3931 Product Specifications
Product Style: Motorcycle Intake System
Estimated Horsepower Gain: 6.54 HP @ 5100 RPM
Street Legal In All US States: No
TUV Approved (Europe): No
Air Filter Shape: Unique
Color: Red
Filter Height: 2.125 in (54 mm)
Filter Material: Cotton Gauze
Neck Flange: 2.4 in (61 mm)
Overall Height: 2.5 in (64 mm)
Replacement Filter: E-3975
Size: 9 Inch
Top Material/Finish: Aluminum
Top Style: Metal
California Restricted: Not legal for sale or use in California
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.


Accessories
99-5050.jpg
99-5050 - Filter Care Service Kit - Squeeze
E-3975.jpg
E-3975 - Replacement Filter

Customer Feedback      Be the first to review part RK-3931

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
The technician at K&N was very quick to respond to my query and gave me excellent detailed specifications to fit an air filter to my old Harley Davidson 3 wheel golf cart. The original was lost and this filter fit perfect and performs very well and looks much better than the original. I also run K&N on my Ford Expedition.
Robert Mongeon, Pembroke, Georgia
Great product. I use it on all of my motorcycles, and have never had an issue. The gasket on this unit was pretty thin rubber, and when I recharged the unit last, I had to replace it with a Harley Davidson gasket.
David Borden, Dahlonega, Georgia

K&N RK-3931 fits the following:
2013 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 103 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2013 HARLEY DAVIDSON FXDF FAT BOB 103 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2013 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2013 HARLEY DAVIDSON FLD DYNA SWITCHBACK 103 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2012 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 103 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2012 HARLEY DAVIDSON FXDF FAT BOB 103 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2012 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2012 HARLEY DAVIDSON FXDB DYNA STREET BOB 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2012 HARLEY DAVIDSON FLD DYNA SWITCHBACK 103 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2011 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2011 HARLEY DAVIDSON FXDF FAT BOB 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2011 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2011 HARLEY DAVIDSON FXDB DYNA STREET BOB 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2010 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2010 HARLEY DAVIDSON FXDF FAT BOB 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2010 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2010 HARLEY DAVIDSON FXDB DYNA STREET BOB 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2010 HARLEY DAVIDSON FXD DYNA SUPER GLIDE 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2009 HARLEY DAVIDSON FXDL DYNA LOW RIDER 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2009 HARLEY DAVIDSON FXDF FAT BOB 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2009 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2009 HARLEY DAVIDSON FXDB DYNA STREET BOB 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2009 HARLEY DAVIDSON FXD DYNA SUPER GLIDE 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2008 HARLEY DAVIDSON FXDWG DYNA WIDE GLIDE 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2008 HARLEY DAVIDSON FXDL DYNA LOW RIDER 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2008 HARLEY DAVIDSON FXDF FAT BOB 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2008 HARLEY DAVIDSON FXDC DYNA SUPER GLIDE CUSTOM 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2008 HARLEY DAVIDSON FXDB DYNA STREET BOB 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No
2008 HARLEY DAVIDSON FXD DYNA SUPER GLIDE 96 CI - All Street Legal In All US States: No TUV Approved (Europe): No