The Edelbrock Victor Series Water Pump is designed for maximum flow and equal coolant distribution in street cars, racecars, tow vehicles and motor homes. The aluminum pump has CNC-machined housings with special one-way internal passages. This pump flows at higher velocities even at low engine speeds. The CNC-machined, cast iron impellers are larger than other impellers and have curved vanes. It produces greater flow with less cavitation and provides maximum flow and cooling equally to both sides of the block. It is 0. 625 inch in diameter and the dimension from block surface to hub is 5. 70 inch.