4AN to 4AN Flare Union AN/AN

The REDHORSE PERFORMANCE 4AN to 4AN Flare Union AN/AN is a precision hose adapter designed for high-performance fuel, coolant, and hydraulic systems in modified vehicles. This adapter connects two 4AN flare hoses with reliable male-to-male union fittings, making it essential for custom plumbing installations. Whether for a turbocharged engine's fuel system or upgraded brake lines, this fitting ensures leak-free connections under demanding conditions.

Manufactured by REDHORSE PERFORMANCE, this 4AN union utilizes industry-standard flare seat geometry to create a mechanically positive seal without the need for thread sealant tape or compounds. The AN/AN designation indicates both ports feature AN-spec 37-degree flare fittings, allowing for direct connections between matching hoses or manifold ports. Its precision-machined construction is designed to handle pressures up to 100 PSI, making it suitable for various automotive applications.

Professional engine builders, fuel system integrators, and serious performance enthusiasts rely on this union for custom fuel rails, turbo feed lines, and brake system modifications. Its compact design, measuring 2.8 inches in length, fits tight engine bays where space is critical. This fitting is an excellent choice for those looking to enhance their vehicle's performance and reliability.