Adapter Fitting -6 LT-1 FI 3/8 Line Feed Side

The Adapter Fitting -6 LT-1 FI 3/8 Line Feed Side by FRAGOLA is a precision fuel line adapter engineered for modern fuel-injected engine conversions and performance fuel system upgrades. This straight adapter bridges the gap between AN (Army-Navy) standardized fittings and traditional SAE quick-disconnect couplings, making it essential for builders transitioning vintage or carbureted engines to fuel-injected platforms like the LT-1 small block. Whether you're installing a standalone EFI system, upgrading fuel delivery on a stroker build, or adapting modern fuel rails to older chassis, this fitting ensures reliable, leak-free connections under high-pressure fuel system demands.

Constructed from lightweight aluminum with black anodized finish for corrosion resistance and durability, the adapter features a 6 AN male thread on one end and a 3/8 inch SAE female quick-disconnect port on the opposite end. The straight-flow design eliminates unnecessary bends that could restrict fuel flow or create turbulence in the line, critical for maintaining consistent fuel pressure and atomization in fuel-injected engines. The anodized aluminum construction resists galvanic corrosion from ethanol-blended fuels and offers excellent thermal stability, while the compact 1.35 x 1.1 x 4.1 inch footprint allows installation in tight engine bay configurations common to retrofit applications.

This adapter is ideal for mechanics and engine builders undertaking LT-1 fuel injection conversions, LS swaps into older vehicles, or custom fuel system fabrication where OEM quick-disconnect couplings must mate with modern braided stainless steel fuel lines and AN-threaded components. It's particularly valuable for applications requiring clean, professional-grade fuel system plumbing that meets street rod or competition standards. Installation is straightforward—simply thread the 6 AN male end into your fuel rail or distribution block and connect the 3/8 SAE quick-disconnect to your existing fuel line infrastructure, ensuring all connections are torqued properly and validated for pressure integrity before engine startup.