-12an Replacement Port Fittings

The Moroso -12AN Replacement Port Fittings are essential components for custom fuel systems, coolant lines, and hydraulic brake setups in high-performance vehicles and engine builds. These fittings serve as direct replacements for damaged or corroded ports on fuel rails, manifolds, heater cores, and transmission coolers. They are designed to ensure reliable fluid transfer under pressure, making them ideal for various automotive applications.

Moroso's -12AN fittings feature straight-threaded JIC (Joint Industry Council) geometry, meaning the seal occurs at the conical seat of the hose end rather than at the fitting body itself—critical for preventing leaks at high PSI. The fittings are constructed from aluminum with hardcoat anodizing, which resists corrosion from fuel additives and engine bay heat cycling. This design ensures durability and performance in demanding environments.

Mechanics and engine builders rely on these fittings when retrofitting fuel injection onto classic carb platforms or replacing failed OEM ports during long-block assembly. Their lightweight design and compatibility with various applications make them a valuable addition to any performance engine build. Installation is straightforward, allowing for quick and efficient upgrades to your vehicle's systems.