Upgrade your Yamaha’s cooling system with the Boyesen Supercooler Water Pump Cover and Impeller Kit. Designed for off-road riders who demand peak performance, this kit improves coolant flow across all RPM ranges, ensuring your engine runs cooler and more consistently under the harshest conditions.

Constructed from aluminum and investment-cast for precision, the cover and patented nautilus-style impeller deliver superior hydrodynamic efficiency. By maintaining a more stable, lower engine temperature, you’ll enjoy extended engine life, smoother power delivery, and increased reliability. The black powder-coated finish adds durability and a sleek, professional look to your engine.

Experience the difference a stable, cooler engine can make. Choose the Boyesen Supercooler Kit and ride with confidence.

Item Specifics:

• Brand: Boyesen
• Manufacturer Part Number: WPK-37AB / 0940-1366
• Product Name: Cover and Impeller Kit
• Type: Water Pump
• Model: Supercooler
• Color/Finish: Black / Powder-Coated
• Material: Aluminum
• Units: Kit
• Riding Style: Off-Road
• Features:
  • Aluminum investment-cast water pump cover and impeller combo
  • High-flow, hydrodynamic design tested for increased coolant flow
  • Maintains a cooler, more constant engine temperature at all RPM ranges
  • Patented nautilus-style impeller enhances efficiency
  • Extends engine life by improving thermal stability

Fitment Table:

(Please verify your specific year and model for exact compatibility.)

Package Information:

• Weight: 0.4 lbs
• Dimensions:
  • Height: 2.5 inches
  • Length: 5.7 inches
  • Width: 4.5 inches
• Condition: New

Note: Please confirm your motorcycle’s year and model for proper fitment before purchasing. 

Cool your ride with the Boyesen Supercooler Kit—experience enhanced performance and extended engine life on every adventure!