Proflow's Ultra Cool cast aluminium water pumps are ideal for street use. They feature a stamped steel impeller that provides optimum water flow, while consuming less horsepower than stock pumps. The Ultra Cool pumps also feature a heavy-duty shaft, bearing, and seal. Ultra Cool aluminium pumps weigh approximately 30 to 50 percent less than stock iron pumps, and have an exclusive counter bore to keep the bearing from walking in the housing. They come in raw or a black powder coated finish.