Description
Engine coolant flow directly impacts thermal stability and longevity—inadequate circulation forces your engine to work harder and run hotter, compromising performance and reliability. The BOYESEN Impeller/Waterpump Cover WPK-38AB uses a patented nautilus-style impeller design to increase coolant volume across the entire RPM band, maintaining more consistent operating temperatures and reducing thermal stress on critical components. This aluminum investment-cast assembly is a bolt-on upgrade that extends engine life while improving overall thermal efficiency.
- Aluminum investment-cast construction
- Patented nautilus impeller
- High-flow hydrodynamic design
- Increased coolant circulation
- Consistent temperature maintenance
- Tested across RPM ranges
- Bolt-on installation
- MPN: WPK-38AB
- OEM-compatible fitment









