K&N ENGINEERING E-9233 Air Filter; Conical Closed; H-2.5 in.; ID-10.438 in.; OD-12.75 in./9.438 in.; Closed Top w/Inner Wire; Biodegradable Cleaning Product Adds Up To 15 Extra Horsepower Made From Cotton/Screen Wires; Keeps Dirt On Outside Additional Filtering Barrier; Long Lasting Performance Reusable/Washable; Double Air Flow