Activated Charcoal Cabin Air Filter (CUK2855) by MANN-Filter®. Activated Charcoal Filter. With the activated carbon layer embedded in the media, this filter easily bonds pollutant gases such as sulfur dioxide, ozone and fuel vapors in the pores of the activated carbon, which are 10,000 times finer than a human hair adsorbing exhaust fumes and unpleasant odors.