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K&N · RK-3931

Part #: RK-3931
UPC: 024844244147

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Description: Intake System; K&N Air Cleaner Assemblies are designed to get more horsepower from your Harley-Davidson motorcycle. These assemblies utilizes the stock cover to maintain stock appearance.

Description:

Description

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.

Features & benefits

  • Designed to increase horsepower & torque

Application summary

Year Make / model
2012-2016 Harley-Davidson FLD Switchback
2008-2010 Harley-Davidson FXD Dyna Super Glide
2008-2014 Harley-Davidson FXDB Street Bob
2008-2014 Harley-Davidson FXDC Super Glide Custom
2008-2016 Harley-Davidson FXDF Fat Bob
2008-2009 Harley-Davidson FXDL Dyna Low Rider
2014-2016 Harley-Davidson FXDL Dyna Low Rider
2014-2016 Harley-Davidson FXDL Low Rider
2008 Harley-Davidson FXDWG Dyna Wide Glide
2010-2016 Harley-Davidson FXDWG Dyna Wide Glide

Specifications

GTIN
00024844244147
Weight
3.13 lb
Height
4.88 in
Length
11.75 in
Width
9.5 in
EO
Legal US
Life cycle
Discontinued
Alt. part number
RK-3931
AAM brand code
KAN
Warehouse brand code
KAN
AAIA brand code
BBWQ

Attributes

Air Box Included
No
Air Filter Color
Red
Air Filter Height
2.125 in (54 mm)
Air Filter Inside Diameter
0 in (0 mm)
Air Filter Material
Cotton Gauze
Air Filter Outlet Shape
Not Flanged
Air Filter Shape
Unique
Air Filter Washable
Yes
Alternate Part Number
RK-3931
CARB EO Number
D-269-59
California Proposition 65
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Clamp Color/Finish
Not Applicable
Clamp Material
No Clamps Required
Clamp Style
No Clamps Required
Clamps Included
No Clamps Included
Color / Finish
Red Filter, Aluminum Top
Couplers Included
None
Estimated Horsepower Gain
6.54 HP @ 5100 RPM
Horse Power Increase
7 HP
Inlet Diameter
2.406 in (61 mm)
Mass Air Flow Sensor Adapter Included
No
Mounting Hardware Included
Yes
Neck Flange
2.406 in (61 mm)
Oil Included
Yes
Overall Height
2.5 in (64 mm)
Package Material
Paperboard
Package Type
Box
Product Box Height
4.88 in (124 mm)
Product Box Length
11.75 in (298 mm)
Product Box Width
9.5 in (241 mm)
Product Style
Motorcycle Intake System
RPM
5100
Replacement Filter
E-3975
Size
9 Inch
Street Legal In All US States
Legal for use in all 50 states.
Style
Teardrop
TUV Approved (Europe)
No
Title
K&N RK-3931 Intake System-Harley Davidson
Top Material
Aluminum
Top Style
Metal
Warranty
No-Hassle Lifetime Limited
Weight
3.1 lb (1.4 kg)

Fitment status

Select a vehicle or engine to see whether this part applies to your application.

Application summary

2012-2016 Harley-Davidson FLD Switchback; 2008-2010 Harley-Davidson FXD Dyna Super Glide; 2008-2014 Harley-Davidson FXDB Street Bob; 2008-2014 Harley-Davidson FXDC Super Glide Custom; 2008-2016 Harley-Davidson FXDF Fat Bob; 2008-2009 Harley-Davidson FXDL Dyna Low Rider; 2014-2016 Harley-Davidson FXDL Dyna Low Rider; 2014-2016 Harley-Davidson FXDL Low Rider; 2008 Harley-Davidson FXDWG Dyna Wide Glide; 2010-2016 Harley-Davidson FXDWG Dyna Wide Glide
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