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Boyesen Supercooler Water Pump Kit - Suzuki RMZ450 2008-18, RMX450Z 2010-18 - Magnesium

Code: BYWPK-26AM
  • Now £242.24
  • (Delivery from £14.99)
Item out of Stock | Usually dispatched within 48 hours
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Internal engine heat, although needed for horsepower, is also extremely destructive to your engine if it is not managed properly.

Boyesen SuperCooler Water Pump Cover and Impeller Kits are specifically designed to enhance the performance of your engine's cooling system. These high-flow, hydrodynamic water pump kits have been tested and designed to flow more coolant. By increasing the flow, the engine will run cooler at a more constant temperature.

The Boyesen Supercooler can reduce engine temperatures by as much as ten degrees, as confirmed by tests at Team Kawasaki. How does the Supercooler achieve this? Hydrodynamics. Boyesen's investment-cast aluminum water pump cover has bigger water inlets, a sculpted design, no casting seams, less restrictive corners, a more efficient impeller and less cavitation.

Tech Spec:


Stock waterpump systems typically have relatively small intake passages which ultimately reduce their overall coolant re-entry efficiency capacity and greatly reduces internal cooling system fluid pressure. Internal fluid pressure is the most important element that affects how effective your cooling systems is at engine heat dissipation. By using larger inlet openings the Supercooler allows your bike's coolant to re-enter into your engine faster and get to your expensive cylinder faster, ultimately making more coolant available to absorb and remove heat. Less heat = more horsepower at the end of the moto.


Stock waterpump interiors often exhibit square-edged internal channel surfaces and sharp-edged fluid inlet passages. These imperfections are most often the result of mass production tooling limitations and are the leading cause of most stock waterpump's inability to deliver enough coolant to your engine when it is raced hard, or for long periods of time in hot and muddy conditions. This is where the Supercooler shines in comparison to your stock waterpump system.

The Supercooler's Opti-Form interior surfacing process eliminates all coolant flow "pinch-points" resulting in a hydrodynamically efficient interior that dramatically increases coolant flow efficiency and ultimately leads to increased fluid flow re-entry rates into your bike's engine.


The Supercooler's hydrodynamically optimized impeller increases overall coolant flow rates and virtually eliminates coolant cavitation when compared to stock waterpump designs.

The Supercooler's impeller is designed to be HYDRODYNAMICALLY EFFICIENT, meaning that it not only propels the cooling fluid into the engine without cavitation, but it demands less parasitic loss from the engine. These two factors allow your bike's engine to produce more horsepower and most importantly MAINTAIN that output throughout the long summer motos, or in muddy conditions. Boyesen's patented Pro-Flow anti-cavitation impeller is one of the most beneficial performance improvements when comparing the Supercooler to stock waterpump systems. The anti-cavitation performance of the Pro-Flow impeller increases overall coolant flow rates and increases your bike's ability to handle high heat dissipation.


For more in depth information regarding delivery and returns please refer to the dedicated delivery & returns pages in our FAQ.



All orders are dispatched as quickly as possible, using either Royal Mail 24 or DPD (for larger items.)

Delivery charges:

UK Delivery:

  • We offer FREE SHIPPING on ALL UK orders!*

European Delivery:

  • Up to 1KG = £9.99
  • 1-2 KG = £14.99
  • 2+ KG = £19.99

Rest Of The World Delivery (Includes all countries outside of the European Union):

  • Up to 1KG = £14.99
  • 1-2 KG = £19.99
  • 2+ KG = Due to size/ weight constraints we cannot ship items heavier than 2KG outside of the EU


If you require an exchange or refund please return the item(s) to the address below along with the return form included with your order(s) and we will promptly exchange or refund the item for you.**


Dennis Winter Ltd
Canalhead Service Station
South Street
East Yorkshire
HU17 5NY


*Please note: Due to some constraints & restrictions when shipping with carriers to highlands & islands there can sometimes be additional delivery charges to these locations within the UK.

**If an item is returned the customer is required to cover the cost of return P&P (unless otherwise agreed) - Terms and conditions may apply.


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