#4-#4 Female/Female Swivel Union

The #4–#4 Female/Female Swivel Union from Triple X Race Components is a straight-port AN fitting adapter engineered for high-flow hydraulic and pneumatic line applications in motorsports, custom fabrication, and performance systems. This swivel union enables directional flexibility in tight engine bays and complex plumbing layouts while maintaining full flow capacity at the #4 AN size, commonly used in racing fuel systems, transmission coolers, and intercooler piping where vibration tolerance and repeated disconnection are critical.

Manufactured from aluminum and finished in black anodize, this adapter combines lightweight construction with corrosion resistance in engine compartment environments. The dual female ports accommodate standard #4 AN hose fittings on both ends, while the integrated swivel joint allows one side to rotate independently—a feature that reduces installation stress on rigid plumbing and hose assemblies during assembly and thermal cycling. The compact profile (2 × 0.7 × 2.85 inches) and minimal weight (0.03 lbs) make it ideal for weight-conscious applications without sacrificing structural integrity.

Suitable for circle-track racing, street performance builds, and marine engine installations, this swivel union is purchased individually, allowing builders to outfit multiple connection points with precision adapters. Triple X Race Components' focus on motorsports plumbing ensures compatibility with OEM and aftermarket fuel systems, coolant circuits, and pneumatic control lines where AN standardization is required.

When specifying hydraulic and pneumatic adapters for performance applications, verify AN port size, thread type (straight vs. tapered), and swivel functionality against your system's requirements. This female-to-female configuration bridges two hose assemblies or rigid fittings; confirm compatibility with your existing plumbing before ordering.