Arlen NESS Big Sucker™ Air Filter Kit - Natural - Stage I775845393 Product Description Each hidden breather is O ringed at the heads and exits at the mouth of the injector carb to provide efficient engine breathing, eliminating the need for any external hoses or hardware Standard red filters are pre oiled, washable and feature four layers of surgical grade cotton for optimum filtration and maximum airflow Radius air inlet provides maximum performance by providing unobstructed airflow One piece aluminum