Efficient filter media offers increased dirt-collecting capability and ability to capture more engine-harming particles, Advanced engine protection, Premium gasket included, Anti-drain back valve holds a reserve of oil in the filter to help protect the engine during start-ups, Built for both synthetic and conventional oils, Part Reference Numbers : 85226 S5277 X5276 CH8481 EF25277 L25276 51226, Kit Includes: 4x Engine Oil Filter, Kit Variations: K56-100029 K56-100068 K56-100131 K56-100177 K56-100217 K56-100257 K56-100297 K56-100337 K56-100377 K56-100417, Part Reference Numbers : 85226 S5277 X5276 CH8481 EF25277 L25276 51226