A-WF2131-AI Filter, Water, Spin-On (QTY 1)One New Aftermarket Replacement Spin On Water Filter for Cummins, Fits Case, and Fits Caterpillar Diesel Engines This spin on water filter is a direct replacement for Fleetguard (Cummins Filtration) part number WF2131. It installs in the engine cooling system and delivers coolant additive (DCA2+) in tablet form to protect against cavitation, corrosion, and scale buildup in diesel engine cooling systems. Not recommended for use on Cummins spark ignited
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