K&N® Recharger® Kit 99-5000 is designed to restore the performance of your K&N® oiled cotton air filter, and includes a 6.5-ounce aerosol can of oil and a 12-ounce spray bottle of POWER KLEEN®. POWER KLEEN® industrial strength degreaser helps dissolve dirt, old filter oil, and other filter-clogging particulates, allowing them to be rinsed away easily with® water.