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 aluminium backplate 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.
Features:
- Increases horsepower.
- Washable and reusable.
- Fits inside stock cover.
- Provides increased airflow.
Specifications:
- Estimated Horsepower Gain: 8.43 HP @ 3700 RPM
- Replacement Filter: E-3972
- Air Filter Material: Cotton Gauze
- Size: 9 Inch
- Inlet Diameter: 2.469 in (63 mm)
- Overall Height: 1.875 in (48 mm)
- Weight: 3.5 lb (1.6 kg)
- Neck Flange: 2.469 in (63 mm)
