Bosch Premium Oil Filters feature exclusive FILTECH media technology that screens out more harmful particles and dirt, preventing premature wear and engine failure. OE fit is ensured through strong steel base plates and housings that prevent warpage, leaks and poor fit. Bosch Premium Oil Filters incorporate a silicone anti-drain back valve that ensures your vehicle's engine receives a supply of clean oil when the vehicle is started. Bosch's high lubricity gasket design provides a tight, leak proof seal, yet allows for easy removal when it's time for an oil change. Rugged metal spiral-wound center tube reinforces internal strength for superior durability over the life of the filter.