Air filter is a device which removes solid particulates such as dust, pollen, mold, and bacteria from the air, Air filters are used in applications where air quality is important, notably in building ventilation systems and in engines. it improve throttle response and air inhalation dramatically, free flow design for maximum horsepower. durable construction, reusable and changeable double layer pre-oil foam filter.

Filter Paper: Pleated paper filter elements are the nearly exclusive choice for automobile engine air cleaners, because they are efficient, easy to service, and cost-effective. The "paper" term is somewhat misleading, as the filter media are considerably different from papers used for writing or packaging, etc. There is a persistent belief amongst tuners, fomented by advertising for aftermarket non-paper replacement filters, that paper filters flow poorly and thus restrict engine performance. In fact, as long as a pleated-paper filter is sized appropriately for the airflow volumes encountered in a particular application, such filters present only trivial restriction to flow until the filter has become significantly clogged with dirt.