Boyesen Supercooler Waterpomp Magnesium Yamaha WR426F 2001-2002 WR450F 2003-2015 YFZ450R 2004-2013 YFZ450RE2 2007 YFZ450RSE 2009-2013 YZ426F 2000-2002 YZ450F 2003-2009

Supercooler Water Pump Cover and Impeller Kit An aluminum investment-cast water pump cover and impeller combo; specifically designed to enhance the performance of your engines cooling system This high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolant By increasing the flow at all rpm ranges, the engine will run cooler at a more constant temperature Patented nautilus style impeller for hydrodynamic efficiency Extend engine life