Full Depth Foam Air Filters by True Flow

True Flow foam filters, designed to give you the best combination of filtration and airflow, represent the latest advance in air filtration technology for automobiles. True Flow foam filters are made up to two part polyurethane foam. The composition of our foam filters is a series of tiny interlocking cells of uniform size without straight through passageways, that create an impossible journey for dirt particles. Each passageway is like hundreds of very small oil bath filters or cells connected one to another. The cell strands stop the dirt, while the oil film holds the dirt like fly paper until removed when the filter is cleaned. This is why foam filters are referred to as "full depth" filters. Foam filters are over 12 times thicker than paper or gauze elements, which are screens, or "surface type" filters. Because foam is a full depth filter even as dirt is being stopped, airflow can continue at a high rate by simply going around the trapped dirt. Unlike paper and gauze filters, foam filters will continue to perform well as the filter gets dirty. With its lifetime warranty True Flow foam filters are washable and reusable to give any automobile a lifetime of great filtration and performance.