Edelbrock # 8819 Water Pump small block Victor Pro designed for high output racing engines, especially dirt late model and circle track applications. They feature a two-piece cartridge style design for easy maintenance and improved performance. The two-piece design features improved symmetrical flow paths resulting in increased flow and requiring less horsepower from the engine. A new aggressive 3.45" impeller with improved inlet and outlet port designs provides maximum cooling with equal distribution making these water pumps highly efficient. All of this helps eliminate hot spots in the engine, producing optimum power from every cylinder. Finally, they feature a -2 an bleeder screw for quick coolant system bleeding.