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 : 95241 S10390 X10390 CH11816 EF21350 L21350 WL10241, Kit Includes: 4x Engine Oil Filter, Kit Variations: K56-100451 K56-100464 K56-100477 K56-100490 K56-100503 K56-100529 K56-100542 K56-100555 K56-100568 K56-100581, Part Reference Numbers : 95241 S10390 X10390 CH11816 EF21350 L21350 WL10241