Boyesen Impeller/Waterpump Cover - Black - Yamaha Wpk-38B

• 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

Yamaha -- YFZ 450 4x2 -- (2008, 2009, 2006, 2004, 2007, 2005, 2012, 2013); Yamaha -- YZ 450 F -- (2004, 2005, 2006, 2003, 2007, 2008, 2009); Yamaha -- WR 450 F -- (2004, 2008, 2011, 2012, 2003, 2013, 2010, 2014, 2015, 2009, 2005, 2006, 2007); Yamaha -- WR 426 F -- (2001, 2002); Yamaha -- YZ 426 F -- (2001, 2002, 2000)