High-quality long-life filters that deliver optimal cleaning efficiency and protection for your engine. A stable pleat design maximizes the filter surface area and dirt holding capacity. This ensure efficient and reliable filtration during the entire service interval. The ant-drain valve prevents the filter from emptying when the engine is switched off, ensuring the necesary oil pressure is immediately available upon restart. Flexible sealing rings provide safe and reliable sealing, even in extreme cold conditions. Teflon-coated by-pass valve, allowing the oil to pass unfiltered to keep the engine lubricated even if the filter media is blocked. Pressure-resistant and anti-corrosion protected filter housing with dual-flanged end panel to prevent leakage.