The Airaid Universal Replacement Filter utilizes a urethane body that will not crack or curl. These filters are tested to SAE standard J726, the method for testing fractional efficiency of a filter. The durable epoxy-coated wire mesh is specially designed to provide optimum balance between maximum air flow and peak filtration. They are direct replacement filters which replace your original factory filter. These superior air filters are washable, reusable and last the life of the vehicle. They provide a dramatic improvement over factory air intake systems.