Description
Engine cooling efficiency directly impacts performance and longevity. The BOYESEN WPK-38M waterpump cover and impeller combo uses a patented nautilus-style impeller design to increase coolant flow across all RPM ranges, keeping your engine running at a consistently lower operating temperature. This means better thermal stability under sustained racing conditions and extended engine life for both street and track applications.
- Investment-cast aluminum construction
- Patented nautilus impeller design
- Increased flow all RPMs
- Hydrodynamic efficiency optimized
- Lower consistent engine temps
- Bolt-on installation
- Extended engine lifespan
- High-performance cooling system
- Manufacturer part number WPK-38M









