Pro GUARD 7 air filters from aFe are specifically developed for today's demanding diesel and rigorous off-road applications. They have five layers of cotton gauze and two layers of synthetic fabric, combined with their own specially formulated filter oil, to achieve amazingly high filtration levels without sacrificing airflow. The elements are available in a variety of styles and sizes—for both universal and vehicle-specific applications. Additional features: * Integrated polyurethane bump seal * 100 percent polyurethane top and bottom * 99.7 percent filtration efficiency