Hitachi's Water Pump (WUPs) are crucial to the cooling system preventing your vehicle from overheating! With a cast aluminum housing to keep weight down and machined steel internals Hitachi's WUPs ensure durability with high thermal efficiency. Efficient impeller and flow path designs provide optimal coolant flow and pressure the cooling system. All steel components are powder coated for rust prevention. Designed to meet the exact needs of each specific vehicle, Hitachi's Water Pumps are the premium choice.