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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 Gain:8.43 HP @ 3700 RPM
Air Filter Color:Red
Air Filter Height:1.625 in (41 mm)
Air Filter Inside Diameter:6.188 in (157 mm)
Air Filter Material:Cotton Gauze
Air Filter Outlet Shape:Not Flanged
Air Filter Shape:Oval
California Restricted:Not legal for sale or use in California
Clamp Material:No Clamps Required
Clamp Style:No Clamps Required
Filter Material:Cotton Gauze
Inlet Diameter:2.463 in (63 mm)
Intake Pipe Ports:All intake tube ports needed for the specified applications are included
Mass Air Flow Sensor Adapter Included:Mass Air Flow Sensor Adapter Included When Required
Mounting Hardware Included:Yes
Neck Flange:2.463 in (63 mm)
Overall Height:1.875 in (48 mm)
Part Number:RK-3930
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
Replacement Filter:E-3972
Size:9 Inch
Street Legal In All US States:No
Top Material/Finish:Aluminum
Top Style:Metal
Total Height:1.875 in (48 mm)
TUV Approved (Europe):No
Vacuum Tubing Included:No
Weight:3.5 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