This is a replacement filter element for part number 12-0311288 filter assemblyand can be used in place of part number 9018309. The filter bypass is in theelement. The filtration media in this element is 10 Micron Cellulose with adirt holding capacity of 11. This element has a 3/4″ port size and a 25 PSIbypass. This is the new style filter and will fit the filter assemblies foundon Century, Chevron Holmes and Vulcan Wreckers and Car Carriers. New Style Filter comes out with cover Fits Century 10 Series Car Carrier Century 20 Series Car Carrier Century 15 Series Car Carrier Century 30 Series Car Carrier Century Modular 211 Century Modular Express Century 2465 Century 3212 Chevron Industrial 30 Series LCG Car Carrier Holmes 600R Vulcan Extreme Angle Car carrier Vulcan Modular 804 Vulcan 805 Vulcan Modular 806 Vulcan Modular 807 Vulcan 810 Intruder Vulcan 810 Power Tilt Vulcan Modular 880/890 Vulcan V24 Vulcan V30