BBM Aluminum Water Pump Housing

The PROFORM BBM Aluminum Water Pump Housing (MPN 440-453) is a direct replacement cooling component engineered for classic Mopar B-Series and RB-Series engines, including the legendary 426 Hemi. This aluminum water pump housing serves as a critical junction point in your engine's cooling system, channeling coolant flow from the radiator through the engine block and back. For any serious Mopar builder or restoration enthusiast running period-correct or modified B/RB platforms, this housing provides a factory-compatible solution that maintains OEM fitment while delivering reliable thermal management.

Constructed from high-quality aluminum, this water pump housing offers excellent corrosion resistance compared to cast iron alternatives while maintaining the thermal properties required for consistent engine cooling. The natural aluminum finish provides clean aesthetics in visible engine bays without sacrificing durability or heat dissipation performance. Weighing just 5.74 lbs and measuring 11.5 x 5.7 x 13.3 inches, the compact design integrates seamlessly into tight engine compartments while the precision-cast construction ensures precise water passages that optimize coolant velocity and distribution across all critical engine zones. The aluminum construction also reduces overall engine weight—a benefit appreciated by performance-minded builders looking to improve power-to-weight ratios on their classic Mopar platforms.

This housing is ideal for restorers rebuilding original Mopar B and RB-Series engines, as well as enthusiasts performing engine swaps or overhauls who need factory-specification cooling components. Whether you're refreshing a 440 Magnum, 383 Stroker, or the iconic 426 Hemi, this PROFORM housing integrates with your existing water pump, thermostat housing, and block passages without modification. Installation is straightforward for anyone with basic mechanical skill—simply replace the worn or damaged original housing using standard fasteners and gasket materials. For optimal cooling system performance, pair this housing with a quality thermostat and fresh coolant during your service interval.