Description Did you know that the coolant filter is the dirtest filter on a vehicle? Not only does a coolant filter prevent water pump failure due to debis floating around in your cooling system, but it also maintains the pH level of your coolant, helping it maintain a longer life before it goes acidic. This is the correct coolant filter head that works in conjunction with filter WF2070. The Fleetguard coolant filter does use a unique thread that does not work with most filter heads. Sold individually.