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Washable and reusableDesigned for industrial applicationsEase of maintenanceSuperior filtration protects the engineEasy to installThe K&N E-4780 replacement air filter is designed to increase horsepower and acceleration by reducing restriction and increasing air flow to your engine. The E-4780 is made with layers of woven cotton that offer superior filtration and can be washed and reused repeatedly. K&N replacement air filters can go up to 50,000 miles before cleaning is required, depending on driving conditions. The E-4780 is easy to install and is custom designed to fit right into the factory air box of select IMPCO industrial engines, as well as other applications.