8AN Female Flare to Male 6 ORB Adapter 9/16 x 18

The 8AN Female Flare to Male 6 ORB Adapter 9/16 x 18 from VIBRANT PERFORMANCE is a precision hydraulic and fuel line fitting designed for custom automotive and motorsports applications where AN (Army-Navy) and ORB (O-Ring Boss) connections must interface. This straight adapter enables seamless integration between systems using different port standards, making it essential for builders upgrading fuel systems, turbo lines, or cooling circuits on high-performance vehicles. Whether you're retrofitting a fuel system onto a race engine or adapting legacy plumbing to modern components, this fitting ensures leak-free operation under demanding conditions.

Constructed from aluminum and finished in black anodize, this adapter combines durability with corrosion resistance while remaining lightweight—critical for motorsports applications where unsprung weight matters. The 8AN female flare connection (9/16 x 18 thread pitch) accepts standard flared fittings, while the 6 ORB male end threads directly into O-ring boss ports found on fuel rails, turbochargers, and aftermarket manifolds. The straight configuration minimizes turbulence and pressure loss compared to 90-degree alternatives, making it ideal for applications where flow efficiency and system pressure stability are paramount.

This adapter benefits engine builders, performance shops, and DIY enthusiasts tackling custom fuel system installations on turbocharged, supercharged, or naturally aspirated engines. Common applications include connecting aftermarket fuel regulators to OEM rails, plumbing standalone ECU fuel systems, or adapting metric ORB ports to AN quick-disconnects. Ensure port sizes match your existing hose fittings and fuel components; the 8AN female accepts standard -8 flared line sizes while the 6 ORB male threads into compatible boss ports with proper thread sealant applied to prevent fuel weeping under boost or high RPM.