RK-3930 K&N Intake System-Harley Davidson

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SKU
RK-3930
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Intake System-Harley Davidson
The K&N RK-3930 Air Intake System was designed to get more horsepower from your Twin Cam Harley-Davidson engine. Built around the legendary K&N High-Flow Air Filter, this RK Series assembly includes an innovative powder coated billet aluminum back plate that eliminates external breathers and features a built-in, dyno-tuned velocity stack. The result is a significant airflow increase to the engine without sacrificing filtration. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover.
  • Increases horsepower
  • Washable and reusable
  • Fits inside stock cover
  • Provides increased air flow
Estimated Horsepower Gain8.43 HP @ 3700 RPM
Replacement FilterE-3972
Air Filter ColorRed
Air Filter MaterialCotton Gauze
Warranty1,000,000 Miles/10 Year
Product StyleMotorcycle Intake System
Size9 Inch
Air Filter ShapeOval
Air Filter Height1.625 in (41 mm)
Air Filter Inside Diameter6.188 in (157 mm)
Air Filter Outlet ShapeNot Flanged
CARB EO NumberD-269-55/59
Street Legal In All US StatesYes
TUV Approved (Europe)No
Inlet Diameter2.469 in (63 mm)
Overall Height1.875 in (48 mm)
Top StyleMetal
Top MaterialAluminum
Clamps IncludedNo Clamps Included
Clamp StyleNo Clamps Required
Clamp MaterialNo Clamps Required
Weight3.5 lb (1.6 kg)
Product Box Height4.88 in (124 mm)
Product Box Length11.75 in (298 mm)
Product Box Width9.5 in (241 mm)
Couplers IncludedNone
Mounting Hardware IncludedYes
Neck Flange2.469 in (63 mm)
StyleOval
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Warning: Cancer & Reproductive Harm – P65Warnings.ca.gov

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K&N is the home of the original red oiled air filter. In the early 1960s, two motorcycle racers, Ken Johnson and Norm McDonald (K&N), developed a ground-breaking new idea for an oiled air filter. Five decades later, K&N® is still innovating industry-leading filtration technology, and offers outstanding protection for everything from top-fuel dragsters to commuter vehicles across the globe. Thank you for helping us reach 50 years in business!


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