For Sale Here Is A New Aftermarket NADP Detroit Diesel Series 50/60 Water Pump (Rear Mount). Items are also for sale locally. Any information contained in this listing is subject to change. You have 30 days to file a return. Products from North American Diesel Parts presented in this listing are not to be confused with any of the products or trademarks of any OEM company. All parts listed to fit these manufacturers are replacement aftermarket parts.