This aFe POWER Air Filter Restore Kit is specifically developed for our air filters with oiled cotton gauze media . The POWER CLEANER effectively breaks down dirt and dust without damaging the media, while the oil captures debris during use. Simply apply the cleaner onto the filter element, let it soak, and rinse. Once dry, the oil can be applied. Take care to not over-oil the filter. Refer to the instruction sheet for more information.