Female -12AN to Male -16AN Adapter Fitting

The Female -12AN to Male -16AN Adapter Fitting by Vibrant Performance is an essential hydraulic line connector for custom fuel systems, turbo installations, and high-flow cooling circuits where port sizes don't match between components. This adapter solves a common sizing mismatch encountered when integrating aftermarket fuel rails, surge tanks, or transmission coolers into existing engine bays where standardized fittings prevent proper alignment. Whether you're upgrading from OEM -12AN lines to larger -16AN capacity systems or consolidating mixed-size plumbing on a street rod or race vehicle, this fitting delivers a reliable solution that eliminates the need for complete line replacement.

Constructed with precision-engineered aluminum construction, the Female -12AN to Male -16AN Adapter Fitting features sealed threads and dual-thread design that accommodates stepped port configurations without leakage under pressure. The -12 AN female inlet receives existing -12 AN hose assemblies while the -16 AN male outlet threads directly into larger-capacity component ports, maintaining full flow integrity across the size transition. Vibrant Performance's extrusion and threading standards ensure consistent fit and minimal turbulence through the adapter body, critical for fuel delivery systems where cavitation or pressure loss can compromise carburetor or fuel injector function. The lightweight 0.16 lb construction makes it ideal for weight-conscious builds without sacrificing durability or chemical compatibility with gasoline, diesel, or synthetic fluids.

This adapter benefits engine builders, fabricators, and DIY enthusiasts who need to bridge port-size gaps during fuel system consolidation or modular component swaps. Installation requires only a wrench compatible with -12 AN and -16 AN porting standards; thread-sealing compound is recommended for maximum pressure retention on systems exceeding 60 psi. Verify component port threading (NPT vs. JIC) before installation, as Vibrant Performance adapters are designed for standard AN porting. Common applications include LS engine fuel system retrofits, custom turbo feed line installations, and vintage muscle car restorations where original plumbing must interface with modern aftermarket components.