Airaid manufactures direct replacement filters. The direct replacement filters have a feature that makes them the most durable in the industry-STAINLESS STEEL. Combine 304 S.S. mesh with our five layer media, and you have the finest filter in the world! Using durable media and premium urethane to bring you superior filtration, it is no wonder Airaid can offer a lifetime "No Hassle Warranty". They know that the filters will last the life of your vehicle.