6AN ML to 3/8in NPT ML 1/8in NPT Hex Blue

The 6AN ML to 3/8in NPT ML 1/8in NPT Hex Blue from REDHORSE PERFORMANCE is a precision hydraulic and fuel line adapter engineered for custom automotive builds, performance fuel systems, and high-flow applications. This fitting serves as a critical junction point in modified engine bays where standard factory connectors fall short of your custom plumbing requirements. Whether you're installing an aftermarket fuel pressure regulator, upgrading a nitrous oxide system, or rerouting coolant lines in a race-prepped engine, this adapter bridges incompatible port sizes with dependable sealing integrity.

This adapter features a 6AN male hose connection on one end, transitioning to a 3/8-inch NPT male port, with an additional 1/8-inch NPT port built into the hex body for pressure gauge or sensor integration. The blue anodized aluminum construction resists corrosion in underhood environments while maintaining lightweight characteristics critical in performance applications. The hex design provides wrench access for torque-down installation without kinking hoses, and dual NPT ports enable complex manifold configurations—ideal for turbo fuel rails, transmission cooler circuits, or custom coolant bypass setups where space and port compatibility demand precision engineering.

Mechanics and fabricators working on carbureted conversions, modern EFI retrofits, and forced-induction systems rely on this adapter to consolidate multiple feed lines into a single, secure manifold point. The compact 2.95-inch length fits tight engine compartments without sacrificing durability, and the REDHORSE PERFORMANCE pedigree ensures thread pitch accuracy for leak-free operation under boost or high fuel pressure. When building turbocharged, supercharged, or nitrous-equipped platforms, proper fitting selection prevents catastrophic fuel system failures—making this 6AN-to-NPT solution an essential component for any serious performance build requiring custom port configurations.