K&N Custom Assembly KRK-3929 (NLA)

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K&N's Sportster RK Series Air Cleaner will get more horsepower from your Harley Davidson Sportster motorcycle. This complete assembly fits inside the stock air cleaner cover, and p rovides a significant increase in airflow. Features: Increases power. Washable and reusable. Provides increased airflow. Fits inside stock cover. Specifications: Estimated Horsepower Gain: 4.4 HP @ 5497 RPM Replacement Filter: E-3040 Air Filter Material: Cotton Gauze Size: 10-12 Inlet Diameter: 2.5 in (64 mm) Overall Height: 2.5 in (64 mm) Weight: 3.1 lb (1.4 kg) Neck Flange: 2.5 in (64 mm) Mounting Hardware Included: Yes Show more