aFe MagnumFLOW Dry Air Filter Cleaner 32oz Spray BottleaFe MagnumFLOW Dry Air Filter Cleaner 32oz Spray Bottle This POWER CLEANER was specifically developed for aFe POWER's PRO DRY S air filters, breaking down dirt and dust without damaging the synthetic material. Simply spray the cleaner onto the filter element, rinse, and your air filter is good to go. No oil is necessary when servicing Pro DRY S air filters. Refer to the instruction sheet for more information.