BB Mopar Water Pump

The BB Mopar Water Pump by Milodon is a high-volume mechanical cooling solution engineered specifically for Mopar B and RB-series big-block engines, including the legendary 426 Hemi. This aluminum pump replaces factory restrictive units and is ideal for engine builders, hot rod enthusiasts, and street performance applications where improved coolant flow and thermal management are non-negotiable. Whether you're running stock displacement or a modified powerhouse, a quality water pump is fundamental to preventing overheating and maintaining engine longevity during sustained driving or racing conditions.

Built from lightweight cast aluminum, the BB Mopar Water Pump features a high-volume impeller design that increases coolant circulation compared to OEM pumps, reducing hot spots and promoting consistent temperature stability across the entire engine block. The 5/8-inch pilot shaft diameter ensures direct compatibility with Mopar B and RB-series pulleys and drive systems without modification. Its natural aluminum finish resists corrosion while maintaining a professional appearance, and the mechanical design eliminates complications associated with electric or serpentine-belt conversions, making it the preferred choice for traditionalists and serious builders who value simplicity and reliability.

This pump is best suited for anyone restoring or building a classic Mopar muscle car, street rod, or small-block to big-block swap project. Installation is straightforward for experienced mechanics familiar with belt-drive engine configuration, and the compact footprint (8.6 x 8.1 x 10.8 inches) fits within standard engine bay constraints. Weighing just 3.93 pounds, the aluminum construction contributes to reduced overall engine weight while delivering the high-volume output necessary for sustained performance driving or show-quality builds.