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

Keep your engine running cooler and more consistent with the Boyesen Supercooler Water Pump Kit (WPK-38M). This magnesium-finish version combines proven Boyesen race technology with a high-flow impeller and precision-machined aluminum cover for maximum cooling efficiency and durability.

✅ What’s Included

• Magnesium-finish aluminum Supercooler water pump cover

• Patented Boyesen high-flow impeller

• Shaft seals & mounting hardware

⚙️ Key Features & Benefits

• Increased Coolant Flow: Advanced impeller design moves more coolant at all RPMs

• Cooler Engine Temps: Improves overall heat transfer for steadier running temperature

• Precision Engineering: CNC-machined aluminum cover with smooth hydrodynamic contours

• Magnesium Appearance: Lightweight look with premium powder-coated finish

• Easy Bolt-On Upgrade: Direct OEM replacement — no modifications needed

• Race-Proven Performance: Trusted by top motocross, off-road, and ATV riders worldwide

📦 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 circulation.

💲 Price: $194.95 (Suggested Retail)
🔢 SKU: 0940-0414 / WPK-38M
🏷️ Brand: Boyesen