BOYESEN Impeller/Waterpump Cover WPK-31B

Engine coolant flow directly impacts operating temperature stability and longevity—particularly under sustained high-RPM conditions where thermal management becomes critical. The BOYESEN WPK-31B replaces the stock water pump cover and impeller with a hydrodynamically optimized design that increases coolant circulation across the entire RPM band, ensuring your engine maintains consistent temperatures rather than fluctuating between hot and cold cycles. This improved thermal consistency reduces stress on engine components and extends overall engine life.

The patented nautilus-style impeller geometry is engineered for maximum flow efficiency without sacrificing reliability, making this a direct bolt-on upgrade for serious builders and racers who demand precision cooling performance.

• Aluminum investment-cast construction
• Patented nautilus impeller design
• High-flow, hydrodynamic geometry
• Increased coolant flow all RPMs
• Consistent engine temperature control
• Bolt-on installation
• OEM fitment compatibility
• MPN: WPK-31B
• Extends engine lifespan