Diesel Site Cast Iron Water Pump with Gasket 94-18 Dodge 5.9L / 6.7L Cummins

The good news is the factory water pump is actually pretty reliable on your Cummins. The bad news is that Cummins, as well as pretty much every single manufacturer of water pumps for this application switched to a plastic impeller. Why would you want to rely on a piece of plastic to keep your engine cool? Yeah, we wouldn't either. Fortunately, DieselSite has this water pump featuring a seven blade cast iron impeller that will give you a lifetime of reliable coolant delivery (and warranteed to do so).