Edelbrock 8860 Water Pump big block Chevy short polished ideal to prevent overheating in street rods and street machines, as well as in tow rigs and motorhomes. Using state - of - the - art racing technology, Edelbrock has designed these super cooling Water Pumps to provide maximum flow, maximum pressure and equal distribution to both sides of the block within 1. Available for most popular applications, these high performance pumps flow in only one direction for optimum efficiency. The casting's computer - designed internal passages and precision powdered metal impeller produce the maximum flow rate possible.