Female -6AN to Male -10AN Adapter Fitting

The Female -6AN to Male -10AN Adapter Fitting from Vibrant Performance is a critical hydraulic line connector for custom fuel, oil, and coolant systems in high-performance vehicles. This adapter bridges two different AN (Army-Navy) port sizes, allowing you to connect -6AN hose or hard line assemblies to -10AN ports on fuel rails, regulators, filters, or engine block fittings. Whether you're building a custom fuel system for a turbo engine, upgrading cooling lines on a LS swap, or integrating aftermarket fuel injection components, this adapter ensures secure, leak-free connections without fabricating custom fittings or compromising system integrity.

Vibrant Performance fittings are manufactured from aluminum alloy with anodized finish for corrosion resistance and durability under underhood conditions. The female -6AN port accepts standard -6AN quick-disconnects and hose ends, while the male -10AN end threads directly into -10AN female ports on fuel system components or manifolds. The stepped design provides a clean transition between line sizes while maintaining full flow capacity and pressure rating compatible with fuel pump systems, boosted engines, and high-volume coolant circuits. Proper thread sealant (PTFE tape or -AN thread sealant) is recommended during installation to prevent seepage and ensure reliability across temperature cycling and vibration exposure.

This adapter is essential for mechanics and enthusiasts performing custom engine builds, turbocharger installations, or fuel system upgrades where component port sizes don't match off-the-shelf hose kits. It's commonly used in LS engine swaps, stroker builds, and race car fuel system plumbing where different suppliers use varying AN port standards. Installation requires only a wrench or AN wrench set and takes minutes once you've pressure-tested and verified your system architecture. Verify your exact port sizes before ordering to ensure proper fitment; measure both the hose connection point and the receiving port on your fuel rail, regulator, or engine block.