K&N RK-3930 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. Attributes GTIN: 00024844200556 Brand Name: K&N Clamp Material: No Clamps Required Clamp Style: No Clamps Required Clamps Included: No Clamps Included Color / Finish: Red Filter, Aluminum Top Couplers Included: None Estimated Horsepower Gain: 8.43 HP @ 3700 RPM Horse Power Increase: 8 HP Inlet Diameter: 2.469 in (63 mm) Mass Air Flow Sensor Adapter Included: No Mounting Hardware Included