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 : 84187 S5581 X5581 CH9911 EF35581 LF610 L35581 57187, Kit Includes: 4x Engine Oil Filter, Kit Variations: K56-100002 K56-100041 K56-100121 K56-100167 K56-100207 K56-100247 K56-100287 K56-100327 K56-100367 K56-100407, Part Reference Numbers : 84187 S5581 X5581 CH9911 EF35581 LF610 L35581 57187