#6 > #8 Union

The #6 > #8 Union adapter from EARLS is a straight-through AN fitting designed to connect fluid lines of different sizes in high-performance hydraulic and fuel systems. This adapter allows you to transition from a #6 AN male port to a #8 AN male connection, making it essential for custom fuel injection setups, brake systems, and cooling circuits where line sizes don't match. Whether you're building a race engine, modifying a street machine, or servicing industrial hydraulic equipment, this union simplifies plumbing while maintaining system integrity.

Constructed from aluminum and finished in blue anodized coating, the #6 > #8 Union delivers excellent corrosion resistance and a clean appearance in engine bays and mechanical assemblies. The straight design ensures minimal pressure drop and turbulence, critical in applications where flow efficiency and system reliability depend on precise fitting geometry. The blue anodize not only protects against oxidation but also provides visual identification, helping technicians quickly identify fitting sizes and connections during assembly and maintenance. AN fittings are industry-standard across automotive, aviation, and marine industries, ensuring compatibility with hoses, tubing, and manifolds engineered to SAE specifications.

This adapter benefits custom builders, performance shops, and restoration specialists who need reliable size transitions without compromising system pressure or flow. Installation is straightforward—simply thread the #6 AN male end into your smaller line port and the #8 AN male end into your larger line connection, using appropriate wrenches to secure both sides. Ideal for use with fuel rails, cooler lines, transmission coolers, and intake manifold circuits, this union works in environments ranging from street cars to competition vehicles. Weighing just 0.05 lbs, it adds negligible mass while delivering proven durability under sustained pressure and temperature cycling.