Swivel Union Female -10 to Female -10

The Swivel Union Female -10 to Female -10 from Allstar Performance is a critical hydraulic and fuel system fitting designed for custom automotive builds where flexibility and reliable connections matter. This adapter serves mechanics and performance enthusiasts who need to route hoses around tight engine bays, tight suspension geometry, or complex plumbing layouts without kinking or stress on the line itself. Whether you're building a custom cooling loop, high-pressure fuel system, or hydraulic brake upgrade, a quality swivel union prevents premature hose failure and vibration-induced leaks that can compromise your engine's reliability.

The -10 AN sizing (5/8-inch outer diameter, 0.620-inch inner diameter) accommodates both fuel and coolant flow at street and mild race pressures, making it versatile for fuel injection upgrades, turbo cooling lines, and transmission cooler circuits. The swivel design allows the fitting to rotate 360 degrees on its ball-seat interface, eliminating the need for adapter elbows and reducing overall system length and weight. Allstar Performance's proven manufacturing ensures minimal internal turbulence and smooth flow paths—critical when running fuel pressure regulators or maintaining laminar flow in precision fuel systems. The compact, lightweight construction (0.11 lbs) adds negligible weight while the female-to-female configuration accepts standard -10 AN hose ends or male adapters on both sides, delivering maximum installation flexibility in tight spaces.

This fitting is ideal for engine bay reorganization during LS swaps, single-turbo conversions, or custom water cooling setups where factory hose routing no longer applies. Street cars, track vehicles, and shop builds all benefit from the ability to angle hoses without fatigue cracks or aluminum adapter failures. Installation is straightforward—thread -10 AN male adapters or hose ends into both ports, apply thread sealant rated for your fluid type, and torque to spec. Compatibility spans any automotive system using AN-10 fittings: fuel delivery, coolant circulation, hydraulic steering, power brake conversions, and custom cooling loops. For builders demanding clean fabrication and lasting reliability, the Swivel Union Female -10 to Female -10 is a no-compromise choice.