#6an UltraPro Twist-On Fitting Str. Black

The EARLS #6 AN UltraPro Twist-On Fitting Straight in black anodized aluminum is a precision hose end connector engineered for high-performance hydraulic and fuel line systems. This straight-configuration adapter connects 6 AN hose to 6 AN female ports, making it an essential component in custom fuel systems, race car plumbing, and performance engine builds where leak-free connections and flow integrity are non-negotiable.

The twist-on design offers quick, tool-free assembly without the need for wrenches or specialized equipment—a practical advantage during engine bay work or mid-build modifications. Constructed from aluminum and finished in black anodize, the fitting resists corrosion while maintaining the lightweight profile critical in performance applications. The 6 AN specification indicates a ⅜-inch hose size, the industry standard for fuel delivery in small-block and mid-displacement engines where adequate flow capacity and minimal pressure drop are required. The straight orientation eliminates the complexity of angled connections, simplifying routing and reducing vibration-induced fatigue at the joint.

This fitting is engineered for builders and technicians assembling custom fuel systems, EFI conversions, nitrous oxide systems, or high-flow cooling circuits where OEM hose ends are insufficient. The UltraPro series represents EARLS' commitment to precision engineering and reliability under sustained pressure cycling—critical for applications running continuous high RPM or intermittent boost. Whether integrating into a street performance engine, race car fuel cell, or remote-mounted fuel pump configuration, this adapter provides the connection integrity required to prevent leaks, maintain system pressure, and ensure safety during operation.