RK-3930 Image

K&N RK-3930 5.0 out of 5 stars 1 Customer Review
Custom Assemblies > Intake System-Harley Davidson

List Price: $288.07
Your Price: $173.99

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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.

[More Information on High-Flow Air Intake Systems for Harley-Davidson Motorcycles]
  • Increases horsepower
  • Washable and reusable
  • Fits inside stock cover
  • Provides increased air flow

Product Specifications

Estimated Horsepower Gain8.43 HP @ 3700 RPM
Air Filter ColorRed
Air Filter Height1.625 in (41 mm)
Air Filter Inside Diameter6.188 in (157 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeNot Flanged
Air Filter ShapeOval
California RestrictedNot legal for sale or use in California
Clamp MaterialNo Clamps Required
Clamp StyleNo Clamps Required
Filter MaterialCotton Gauze
Inlet Diameter2.463 in (63 mm)
Mounting Hardware IncludedYes
Neck Flange2.463 in (63 mm)
Overall Height1.875 in (48 mm)
Product Box Height4.88 in (124 mm)
Product Box Length11.75 in (298 mm)
Product Box Width9.5 in (241 mm)
Product StyleMotorcycle Intake System
Replacement FilterE-3972
Size9 Inch
Street Legal In All US States No
Top Material/FinishAluminum
Top StyleMetal
Total Height1.875 in (48 mm)
TUV Approved (Europe)No
Weight3.5 lb (1.6 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

Product Reviews

  Excellent system. Puts a lot of air in for dual exhaust to process. At an affordable price too. Highly recommended.
Michael Hawaii