The K&N PreCharger filter wrap in black is a washable protective sleeve sized for a 3.5 in. I.D. by 5 in. H round filter, designed to extend service intervals in very dusty conditions. Made from a durable polyester weave, the PreCharger traps fine particles with minimal airflow restriction and can be cleaned with K&N Filter Cleaner to help preserve the underlying K&N filter's performance.
K&N Round Straight - Black - 3.5in ID x 5in H - PreCharger Air Filter Wrap Blue