K&N Precharger Air Filter Wrap - Round Straight - Black - 3.5in ID x 6in HThe K&N PreCharger filter wrap is specially designed to extend the service interval of your K&N Filtercharger filter when used in very dusty conditions. They are made from durable polyester material containing a uniform weave. The PreCharger will stop small dirt particles with minimal restriction to the airflow of the filter. This Part Fits: Year Make Model Submodel 1973 1976 Honda XL175 Base 1974 1975 Honda XL350 Base 1979 1980 Honda XR250 Base 1981