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The K&N DryCharger wrap RX-4990 is a silicone-treated polyester pre-filter designed to cover K&N air filters or flame arrestors, letting high airflow pass while limiting water intrusion. Its uniform micron-sized openings maintain breathability and the water-repellent treatment typically lasts one to two years, helping extend filter life and maintain protection in damp or wet operating conditions.
K&N Air Filter Wrap Drycharger RX-4990 Black
