Intake System-Harley Davidson
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Intake System-Harley Davidson Intake System-Harley Davidson
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K&N Intake System-Harley Davidson

Part No. RK-3930 Warranty Details  
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The K&N RK-3930 Air Intake System was designed to get more horsepower from your Twin CamĀ® Harley-DavidsonĀ® 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.

Product Features:
  • Estimated Horsepower Gain: 8.43 HP @ 3700 RPM
  • Replacement Filter: E-3972
  • Increases horsepower
  • Washable and reusable
  • Fits inside stock cover
  • Provides increased air flow
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Carburetor Neck/Air Horn Diameter:2.463 in
Height:1.875 in
Housing Material:Aluminum
Inside Diameter:6.188 in
Material:Cotton Gauze
Mounting Hardware Included:Yes
Outside Diameter:8.813 in
Shape:Oval in
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