-8AN Female to 1/4inNPT Male Swivel Fitting

The -8AN Female to 1/4 inch NPT Male Swivel Fitting by Vibrant Performance is a precision hydraulic adapter designed for serious fuel system and fluid line work on modified vehicles. This fitting bridges the gap between AN (Army-Navy) threaded components and NPT (National Pipe Thread) systems, making it essential for custom fuel injection tuning, turbocharger oil supply lines, coolant circuits, and brake system modifications.

Vibrant Performance engineered this fitting with a 360-degree swivel design on the female side, allowing hose barb or push-lock connections to rotate freely without twisting the NPT port itself. This rotating functionality prevents stress on rigid NPT fittings—a critical feature when working in tight engine bays where hose routing cannot always be perfectly linear. The fitting is made from precision-machined aluminum, which resists corrosion and handles fuel, oil, and coolant temperatures without degradation.

Mechanics and tuners favor this adapter for fuel system pressure testing, EFI conversions, and turbo upgrades where mixed thread standards are unavoidable. The -8AN size ensures compatibility with standard hoses, while the 1/4 inch NPT male thread ensures compatibility with factory and aftermarket fuel rails, oil coolers, and hydraulic accumulators.