BMC Replacement Air Filters are designed to replace the OEM air filters with an improved alternative, that never needs to be replaced. Made from high-performing materials that allow an increased air flow and combined with efficient filtration that guarantees containment of all impurities from as small as 7 microns (compared to factory 10 microns). Made from multi-layered cotton gauze, soaked with low-viscosity oil that's covered with an epoxy-coated alloy mesh, ensuring protection from gasoline fumes and oxidization due to air humidity. Rubber has an increased life, is durable and has optimum adhesion characteristics. Pre-oiled and washable.