#8 Union Fitting

The #8 Union Fitting by FRAGOLA is a precision straight adapter designed for high-performance fuel, oil, and coolant systems in race cars, custom builds, and performance automotive applications. This 8 AN male-to-male connector joins two hoses or hard lines of identical port size, eliminating the need for separate components and reducing connection points that could compromise system integrity. Built for environments where reliability under pressure is non-negotiable, the union fitting serves as a critical link in any well-engineered power plant plumbing setup.

Manufactured from aluminum and finished in blue anodize, this FRAGOLA adapter delivers corrosion resistance and a professional appearance while maintaining a minimal footprint at just 1.9 inches in length. The straight-through design minimizes turbulence and pressure drop, critical factors when fuel or coolant flow must remain consistent across throttle transitions and sustained high RPM operation. Aluminum construction keeps weight negligible—a mere 0.06 pounds—making it ideal for weight-conscious builds where every ounce counts. The anodized finish protects against oxidation and chemical degradation, ensuring the fitting performs reliably over thousands of miles and multiple seasons.

Enthusiasts and professional builders rely on this union fitting to maintain consistent system pressure and flow in turbocharged engines, fuel-injected platforms, and closed-loop coolant circuits. Installation is straightforward: thread both AN ports hand-tight, then use a wrench to secure with a quarter-turn snug-up. The 8 AN sizing accommodates medium to high flow applications typical of modified street cars and full-race vehicles. Verify compatibility with your existing hose ends and banjo fittings before ordering to ensure proper thread engagement and seal integrity across your complete fuel delivery or cooling circuit.