UNI FILTER Filter CRF250/450X NU-4138ST

Clean easily with grease-cutting dishwashing detergent; just clean, oil and reuse indefinitely, Two-stage air filters come apart for maximum airflow and ultimate cleaning, Most filters feature the Ultra Seal grease groove on the sealing surface, Unsurpassed in airflow, stopping dirt and overall performance, Each fits in stock airbox exactly like OEM filter, Made in the U.S.A.