The Boyesen SuperCooler water pump kit is an aluminum investment cast cover and impeller combo; specifically designed to enhance the performance of you engine’s cooling system. This high flow, hydrodynamic water pump kit has been tested and designed to flow more coolant. By increasing the flow, the engine will run cooler at a more constant temperature. > Cast aluminum construction > Increased coolant flow at all RPM ranges > Reduces cavitation and hydraulic friction > Patented Nautilus style impeller for Hydrodynamic Efficiency > Available in 3 powder coated colors; Silver Vein, Black or Magnesium