Water Pump for 1990-2003 Dodge/Cummins 5.9L ISB and B Series Engines - Alliant Power AP63531 All Alliant Power products are backed with a 13 month unlimited Mileage warranty. Alliant Power Products are backed by First Class Technical Support. Alliant Power supplies over 200 high demand parts for over 20 different engine applications. Alliant Power Products are built to OEM specifications and testing.