But if you do the math and figure that you got 375,000 miles out of a $400 OEM water pump and the non OEM pumps fail every 30,000 miles and you are on your fourth $100 water pump that seems to me to work out to about the same or three times better. Then add in the number of time you had the labor to change four water pumps and number of trips to the auto parts store and risks of being stranded. I did an internet search for OEM Cummins water pumps made in USA and they are also around $100 or so and probably the same part you will probably get from the RAM dealers. I would go to the RAM dealer and check out what they have or providing and see if it matches a Cummins water pump like this $106 one