RK-3947X - K&N Universal Filter - Custom Air Filter Assembly

This part should fit your vehicle. It is a universal part.

Images May Not be Vehicle Specific. For Display Purposes Only.

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Part #: RK-3947X
Notes: Street Metal Series Intake System
Your Price: $378.69

Specs

Air Filter Color Red
Air Filter Height 3.125 in (79 mm)
Air Filter Material Cotton Gauze
California Restricted Not legal for sale or use in California
Color Red
Estimated HorsePower Gain 8.1 HP @ 4.493 RPM
Horse Power Increase 8 HP
Mounting Hardware Included Yes
Overall Height 3.125 in (79 mm)
Product Style Motorcycle Intake System
Replacement Filter E-3986
RPM 4
Title K&N RK-3947X Intake System-Harley Davidson
Top Material/Finish Chrome
Weight 4.3 lb (2 kg)

This Item Also Available In

Part Number Price Notes & Specs
RK-3943 $398.89 Notes Harley Davidson Intake System
Air Filter Color Red
Air Filter Height 2.25 in (57 mm)
Air Filter Material Cotton Gauze
California Restricted Not legal for sale or use in California
Color Red
Estimated HorsePower Gain 6.35 HP @ 5279 RPM
Horse Power Increase 6 HP
Mounting Hardware Included Yes
Overall Height 2.5 in (64 mm)
Product Style Motorcycle Intake System
Replacement Filter E-3040
RPM 5279
Top Material/Finish None
Weight 3.4 lb (1.6 kg)
RK-3946 $503.99 Notes Street Metal Series Intake System
Air Filter Color Red
Air Filter Height 2.25 in (57 mm)
Air Filter Material Cotton Gauze
California Restricted Not legal for sale or use in California
Color Red
Estimated HorsePower Gain 7.56 HP @ 4009 RPM
Horse Power Increase 8 HP
Mounting Hardware Included Yes
Overall Height 2.25 in (57 mm)
Product Style Motorcycle Intake System
Replacement Filter HD-0800
RPM 4009
Title K&N RK-3946 Intake System-Harley Davidson
Top Material/Finish Aluminum
Weight 4 lb (1.8 kg)
RK-3947 $393.89 Notes Street Metal Series Intake System
Air Filter Color Red
Air Filter Height 2.125 in (54 mm)
Air Filter Material Cotton Gauze
California Restricted Not legal for sale or use in California
Color Red
Estimated HorsePower Gain 7.03 HP @ 4009 RPM
Horse Power Increase 7 HP
Mounting Hardware Included Yes
Overall Height 2.125 in (54 mm)
Package Quantity 1
Product Style Motorcycle Intake System
Replacement Filter E-3975
RPM 4009
Title K&N RK-3947 Intake System-Harley Davidson
Top Material/Finish Chrome
Weight 4.3 lb (2 kg)
RK-3947B $343.39 Notes Street Metal Series Intake System
Air Filter Color Red
Air Filter Height 2.125 in (54 mm)
Air Filter Material Cotton Gauze
California Restricted Not legal for sale or use in California
Color Red
Estimated HorsePower Gain 7.03 HP @ 4009 RPM
Horse Power Increase 7 HP
Mounting Hardware Included Yes
Overall Height 2.125 in (54 mm)
Package Quantity 1
Product Style Motorcycle Intake System
Replacement Filter E-3975
RPM 4009
Title K&N RK-3947B Intake System-Harley Davidson
Top Material/Finish Black Powder Coated
Weight 4.3 lb (2 kg)
RK-3947XB $323.19 Notes Street Metal Series Intake System
Air Filter Color Red
Air Filter Height 3.125 in (79 mm)
Air Filter Material Cotton Gauze
California Restricted Not legal for sale or use in California
Color Red
Estimated HorsePower Gain 8.1 HP @ 4.493 RPM
Horse Power Increase 8 HP
Mounting Hardware Included Yes
Overall Height 3.125 in (79 mm)
Product Style Motorcycle Intake System
Replacement Filter E-3986
RPM 4
Title K&N RK-3947XB Intake System-Harley Davidson
Top Material/Finish Black Powder Coated
Weight 4.3 lb (2 kg)
RK-3932XB $378.69 Notes Air Intake System
Air Filter Color Red
Air Filter Height 2.125 in (54 mm)
Air Filter Material Cotton Gauze
California Restricted Not legal for sale or use in California
Color Red
Estimated HorsePower Gain 7.18 HP @ 4662 RPM
Package Contents 1 Air Filter
Package Quantity 1
Product Style Motorcycle Intake System
Replacement Filter E-3986
Street Legal In All US States No
TUV Approved (Europe) No
Weight 4.5 lb (2 kg)
RG-1003RD-L $39.39 Notes Universal Clamp-on Air Filter
Air Filter Large End Diameter 4.5 in (114 mm)
Air Filter Shape Round Tapered
Base Inside Diameter 2.75 in (70 mm)
Base Outside Diameter 4.5 in (114 mm)
Filter Material Cotton Gauze
Flange Angle 0 degrees
Flange Inside Diameter 2.75 in (70 mm)
Flange Inside Diameter 2 2.5 in (64 mm)
Flange Inside Diameter 3 2.25 in (57 mm)
Flange Length 1 in (25 mm)
Flange Offset 0 in (0 mm)
Flange Type Centered
Flanges 1
Height 4.5 in (114 mm)
Inner Wire No
Product Style Tapered Conical Air Filter
Top Material Chrome
Top Outside Diameter 3.5 in (89 mm)
Top Style Metal
Weight 1 lb (0.4 kg)

All Fitments

UNIVERSAL
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
0 - 0 NON APPLICATION SPECIFIC ALL ALL ALL ALL ALL ALL

Product Description

K&N Custom Air Filter Assemblies are designed with the racer in mind. They incorporate good looks as well as the superior air flow that you expect from K&N. K&N Custom Air Filter Assemblies are designed for use with any engine that uses a round element air cleaner housing. They incorporate our famous K&N Air Filters and provide more air flow than other assemblies of this type. Available in 4 different designs, the perfect assembly is sure to be found here. Each complete assembly comes with base, element, and top plate.

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