PRW 1444001 Performance Quotient 5/8" Pilot Shaft High Flow Aluminum Water Pump for Mopar 361-440 BB and 426 Hemi 1958-79 Steel hubs and heavy duty shielded-seal roller ball bearings Pressure injected aluminum alloy pump bodies Back plate "O" ring sealed for competition plus applications Reliable cast iron CNC machined impellers Satin-cast