aFe Filter GUARD Pre-Filters protect your performance air filter and extends your filter cleaning intervals by removing large particles like twigs and bugs from the air stream prior to the air filter. This pre-filter is made of a dry weave fabric that does not attract dirt and cleans with soap and water. The aFe Power logo is silkscreened on the pre-filter to let everyone know an aFe Momentum HD intake is powering your rig.