6AN Male to 6AN Male 1/8in NPT in Hex Blue

The 6AN Male to 6AN Male 1/8in NPT in Hex Blue fitting from Redhorse Performance is a precision adapter built for high-flow fuel and fluid system applications in custom automotive builds. Whether you're upgrading a fuel injection system, installing a turbocharger with external oil supply, or fabricating a custom cooling loop, this adapter bridges two 6AN male ports while integrating a 1/8-inch NPT port for gauge sensors, pressure relief valves, or auxiliary feed lines. This versatile fitting serves engine builders, street machine enthusiasts, and professional fabricators who demand reliability in demanding applications.

Manufactured by Redhorse Performance, a trusted name in AN hose and fitting systems, this adapter features a robust hex body design that simplifies installation and wrench access during tight engine bay layouts. The -6 designation indicates 6AN porting, which handles flow rates critical for fuel distribution, oil cooler circuits, and forced induction systems operating at high pressures. The integrated 1/8-inch NPT port allows you to branch pressure sensors, temperature probes, or bleed valves without requiring additional tee fittings, reducing clutter and potential leak points. Constructed from aluminum alloy with blue anodized finish, the fitting resists corrosion while providing easy identification in complex plumbing networks—essential when troubleshooting or modifying multi-system vehicle projects.

This adapter excels in turbocharged and supercharged engine conversions, LS swaps, and fuel system upgrades where multiple pressure points require monitoring or control. The compact 2.835-inch length makes it ideal for constrained engine bays where space efficiency matters. Installation is straightforward: thread the 1/8-inch NPT port with your chosen sensor or valve fitting, connect your 6AN hoses using standard -6 hose ends, and torque according to Redhorse specifications. Compatible with any fuel system or cooling circuit rated for 6AN components, this fitting integrates seamlessly into both street and race applications demanding professional-grade engineering.