Expander AN -12 Female to -16 Male

The Expander AN -12 Female to -16 Male fitting is an essential adapter for high-performance fuel and fluid systems in modified vehicles, race cars, and custom engine builds. This ALLSTAR PERFORMANCE component bridges two different AN port sizes, allowing mechanics and enthusiasts to connect incompatible hose barbs, carburetors, fuel pumps, and distribution blocks with precision engineering. Whether you're upgrading a carburetor fuel inlet, integrating a new fuel system, or fabricating custom intake plumbing, this expander simplifies complex feed line architectures without sacrificing reliability or flow integrity.

The -12 to -16 AN expander features CNC-machined aluminum construction with precision-engineered female AN-12 and male AN-16 threads, ensuring leak-free connections under high fuel pressure and vibration-intensive engine bay environments. The stepped design accommodates both SAE and AN hose standards, making it compatible with standard braided stainless steel lines and rubber fuel hose assemblies. ALLSTAR's reputation for precision means you get tight tolerances and consistent port geometry—critical when working with carbureted or fuel-injected systems running nitrous, superchargers, or turbochargers where fuel delivery precision directly impacts performance and safety.

Serious builders and tuners rely on this adapter when upgrading fuel systems on vintage muscle cars, street rods, drag cars, and modern engine swaps where factory and aftermarket component ports don't align. Installation is straightforward—thread the female end into your fuel block or carb inlet and connect your -16 male hose barb, then secure with AN hose clamps rated for your system pressure. The compact 2.05 x 1.75 x 4.05-inch footprint fits tight engine bays, and the lightweight 0.19-pound design adds negligible mass while eliminating weak points in your fuel plumbing infrastructure.