K&N Recharger Kit 99-5050BK is designed for cleaning your K&N oiled cotton air filter when it is time to be serviced. The kit comes with K&N Power Kleen air filter cleaner and K&N air filter oil. 99-5050BK will restore air flow efficiency and will bring your K&N oiled cotton air filter to like new condition. K&N Power Kleen works to dissolve the dirt build up and old filter oil, then it can be washed away with water. After the air filter fully dries re-oil your air filter then reinstall it. This Recharger Kit comes with an 8 ounce squeeze bottle of oil and a 12 ounce K&N pump bottle of Power Kleen air filter cleaner.