1.50in Fitting Black

The ALLSTAR PERFORMANCE 1.50in Fitting Black (ALL31136) is a precision aluminum water pump fitting engineered for high-performance cooling systems in racing and powersport applications. This 1-1/2 inch hose barb to 1-1/4-12 O-ring adapter delivers reliable coolant routing in demanding engine configurations where proper flow management is critical to sustained performance.

Constructed from lightweight aluminum and finished in durable black anodizing, this inline water pump fitting resists corrosion and thermal cycling stress. The 1-1/2 inch hose barb connection accommodates standard automotive cooling hose, while the 1-1/4-12 O-ring boss threads accept the corresponding port on modern in-line water pump assemblies. The anodized surface protects against oxidation in aggressive cooling environments, extending component lifespan in both street and track applications.

This fitting is designed for builders integrating aftermarket or relocated water pump systems into custom engines, standalone cooling circuits, and performance cooling upgrades. Engine builders and restoration shops rely on ALLSTAR fittings to ensure leak-free coolant connections that can withstand sustained high-RPM operation and elevated coolant temperatures. The compact design minimizes engine bay packaging constraints while maintaining the flow capacity required by high-displacement and turbocharged engines.

ALLSTAR PERFORMANCE fittings are recognized throughout the racing community for precision manufacturing and compatibility with OEM and aftermarket water pump brands. Whether replacing a damaged fitting or building a complete cooling system from components, this black aluminum adapter provides the reliability expected in competition and high-performance street applications.