12AN to 10AN O-Ring Port Adapter Black Male Male

The 12AN to 10AN O-Ring Port Adapter Black Male Male from Redhorse Performance is an essential fitting for custom fuel system builds, turbocharger installations, and high-flow cooling loops where line size reduction is required. This adapter bridges the gap between larger 12AN hose connections and smaller 10AN ports found on fuel rails, carburetors, and aftermarket fuel pressure regulators. Whether you're upgrading a forced induction system or consolidating fuel delivery lines in a tight engine bay, this male-to-male adapter provides a reliable, leak-free connection.

Redhorse Performance fittings are machined from aluminum alloy and feature precision O-ring ports that eliminate the need for thread sealant tape or Teflon, reducing installation time and contamination risk. The black anodized finish resists corrosion and blends seamlessly with modern engine bay aesthetics while protecting against oxidation in fuel and coolant environments. The dual male configuration allows direct connection between hose barbs, push-lock couplers, or swaged line ends, making this adapter versatile across multiple fuel system architectures and pressure ratings.

This adapter excels in carbureted hot rods, EFI conversions, and turbocharged builds where multiple fuel sources or pressure-regulator bypass loops demand compact fittings in confined spaces. Installation is straightforward—hand-tighten the male ports into their respective components and verify O-ring seating before pressurizing the system. Mechanics and engine builders rely on Redhorse Performance adapters for consistency, durability, and compatibility across fuel injection platforms, making this 12AN-to-10AN reducer an indispensable component for any serious fuel system upgrade or repair.