6an to 3/8in Fuel Inj. Fitting- LT1/LT4

The 6AN to 3/8in Fuel Inj. Fitting- LT1/LT4 is a precision fuel line adapter engineered for serious engine builders and mechanics upgrading or servicing LS-based powerplants. This straight fitting bridges the gap between modern AN (Army-Navy) fuel system components and factory SAE quick-disconnect ports found on LT1 and LT4 engines, making it essential for custom fuel system installations, carbureted conversions, and high-flow fuel pump upgrades. Whether you're restoring a fourth-gen Camaro, building a crate engine swap, or optimizing fuel delivery on a performance street machine, this adapter ensures compatibility between aftermarket fuel rails and factory or modified fuel lines.

Constructed from aluminum and finished in blue anodized coating, the 6AN to 3/8in fuel fitting delivers corrosion resistance and durability in under-hood environments while maintaining a lightweight profile at just 0.08 lbs. The straight configuration eliminates unnecessary bends, reducing turbulence and pressure drop across the fuel circuit—critical for carbureted engines or naturally aspirated builds where fuel distribution consistency matters. The SAE female quick-disconnect end mates seamlessly with factory LT1/LT4 fuel ports, while the 6 AN male end accepts industry-standard braided fuel hose and performance fuel line components from Russell, Earls, or equivalent manufacturers. Aluminum construction resists ethanol fuel degradation and maintains structural integrity under the thermal cycling typical of high-output engines.

Technicians and enthusiasts standardizing on AN fuel systems will find this fitting indispensable for engine bays where factory connections demand SAE compatibility. Installation is straightforward: thread the 6 AN end into your fuel rail or carbureted adapter and mate the quick-disconnect end to the LT1/LT4 fuel port, ensuring all connections are torqued to specification and tested for leaks before start-up. This adapter is equally valuable for vintage restorations incorporating fuel injection on originally carbureted platforms, or for modern LS swaps into older chassis where fuel system architecture must bridge generations of design standards. Buy this Russell fitting for reliable, leak-free fuel delivery in any LT1/LT4-based project.