Boyesen Spectra Supercooler Kit Yamaha Yz450F / Yz450X Boyesen SuperCooler water pump kits feature an intricately designed aluminum cover and impeller that work together to significantly improve your cooling system's performance and reliability. Its hydrodynamic design has been rigorously tested in competitive environments, demonstrating an impressive ability to increase coolant circulation by up to 26 more than standard pumps. This increase in coolant flow aids in maintaining a cooler and more stable engine temperature, leading to enhanced horsepower and optimal engine protection. Features: Increased coolant flow at all RPM ranges Keeps engine in optimum temperature range and prevents overheating Reduces cavitation and hydraulic friction Seamless hydrodynamic design High-capacity inlets Patented nautilus style cast aluminum impeller Offered in multiple powder coated colors to match any machine Does not include a new gasket Note: Images are for reference only, actual pump will vary based on make and model.