BOYESEN Impeller/Waterpump Cover WPK37B

Engine temperature stability is critical to reliability and longevity, especially under sustained load or racing conditions. The Boyesen WPK37B water pump cover and impeller upgrade increases coolant flow across all RPM ranges, allowing your engine to maintain optimal operating temperatures rather than cycling between hot and cold. This consistent thermal environment reduces stress on gaskets, seals, and internal components—directly extending engine life and performance consistency.

The patented nautilus-style impeller design optimizes hydrodynamic efficiency, moving more coolant with less parasitic drag than OEM alternatives. If you're pushing your engine hard, whether on the track or in demanding driving conditions, active cooling management is non-negotiable.

• Aluminum investment-cast construction
• High-flow impeller design
• Patented nautilus geometry
• Increased flow across RPM range
• Bolt-on installation
• MPN: WPK37B
• Enhanced thermal consistency
• Reduced engine wear