BOYESEN Impeller/Waterpump Cover - Black WPK-44B

Engine overheating under load is a performance killer—and stock cooling systems often can't keep pace with modified or high-RPM engines. The Boyesen WPK-44B water pump cover and impeller upgrade increases coolant flow across the entire RPM range, maintaining optimal engine temperatures under sustained stress. This direct upgrade to your existing water pump housing delivers measurable thermal control without requiring complete system replacement.

Built on Boyesen's patented nautilus-style impeller design, this investment-cast aluminum assembly achieves superior hydrodynamic efficiency compared to OEM impellers. The result is consistent cooling performance, reduced thermal cycling, and extended engine longevity—critical for both track days and long-term street use.

• Investment-cast aluminum construction
• Patented nautilus impeller design
• High-flow hydrodynamic geometry
• Increased flow at all RPMs
• Bolt-on installation
• OEM water pump compatible
• Black anodized finish
• MPN: WPK-44B