Boyesen Supercooler Water Pump Cover & Impeller Kit – Black – Yamaha YFZ450 / YZ450F / WR450F

Upgrade your cooling performance with the Boyesen Supercooler Water Pump Kit. Featuring a patented nautilus-style impeller and precision-machined aluminum cover, this kit increases coolant flow, stabilizes engine temps, and extends motor life under race and trail conditions.

✅ What’s Included

• CNC aluminum water pump cover – black powder-coated finish

• High-flow Boyesen Supercooler impeller

• Shaft seals & installation hardware

⚙️ Key Features & Benefits

• Increased Coolant Flow: Hydrodynamic impeller design delivers higher flow across all RPMs

• Cooler Running Temps: Keeps your YFZ450 or YZ/WR engine up to 10°F cooler

• Enhanced Efficiency: Reduces hot spots and cavitation for smoother engine performance

• Durable Aluminum Construction: Investment-cast and powder-coated for long-lasting finish

• Easy Bolt-On Upgrade: Direct replacement for OEM cover and impeller assembly

• Proven Design: Used by top racers for improved thermal stability and reliability

📦 Compatibility

• Yamaha YFZ450 (2004–2009, 2012–2013)

• Yamaha YZ450F (2003–2009)

• Yamaha WR450F (2003–2015)

• Yamaha YZ426F (2000–2002)

• Yamaha WR426F (2001–2002)

🛡️ Warranty Info

Manufacturer warranty included.
Professional installation recommended to ensure proper sealing and coolant flow.

💲 Price: $194.95 (Suggested Retail)
🔢 SKU: 0940-0413 / WPK-38B
🏷️ Brand: Boyesen