Boyesen Supercooler Water Pump Kit – Magnesium YFZ450 / YZ450F / WR450F
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
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Magnesium-finish aluminum Supercooler water pump cover
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Patented Boyesen high-flow impeller
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Shaft seals & mounting hardware
⚙️ Key Features & Benefits
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Increased Coolant Flow: Advanced impeller design moves more coolant at all RPMs
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Cooler Engine Temps: Improves overall heat transfer for steadier running temperature
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Precision Engineering: CNC-machined aluminum cover with smooth hydrodynamic contours
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Magnesium Appearance: Lightweight look with premium powder-coated finish
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Easy Bolt-On Upgrade: Direct OEM replacement — no modifications needed
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Race-Proven Performance: Trusted by top motocross, off-road, and ATV riders worldwide
📦 Compatibility
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Yamaha YFZ450 (2004–2009, 2012–2013)
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Yamaha YZ450F (2003–2009)
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Yamaha WR450F (2003–2015)
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Yamaha YZ426F (2000–2002)
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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
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
