Adapter #4 Flare to 1/8 in NPT

The XRP Adapter #4 Flare to 1/8 in NPT is a precision hydraulic and fuel line fitting engineered for custom automotive fuel systems, brake lines, and fluid transfer applications. Built for enthusiasts and professional mechanics who demand reliability under pressure, this straight adapter bridges 4 AN male flare connections to 1/8 inch NPT male ports—a critical junction in performance fuel systems, carbureted conversions, and high-flow cooling circuits. Whether you're upgrading a classic hot rod fuel delivery system or fine-tuning a modern race car's brake balance, this adapter ensures leak-free connections in demanding engine bay environments.

Constructed from aluminum and finished in blue anodize, the adapter delivers corrosion resistance and a professional appearance while maintaining lightweight characteristics critical in performance builds. The flare-to-NPT configuration allows seamless integration between AN-spec aftermarket fuel rails, carburetors, and factory NPT-threaded engine ports or gauges. The straight design eliminates flow restriction and simplifies installation in tight engine bays, while the blue anodized finish provides visual identification on complex fuel system schematics. Precision machining ensures consistent sealing surfaces that prevent weeping and vibration-induced failures common in poorly manufactured adapters.

This adapter is essential for builders transitioning between AN-standard fuel system components and NPT-threaded factory or aftermarket gauges, regulators, and distribution blocks. Common applications include fuel pressure gauge taps on custom fuel rails, carb-to-tank plumbing in vintage restorations, and sensor port adaptations in EFI conversions. The compact 2.7 x 0.95 x 3.65 inch profile fits tight spaces without requiring rework of adjacent components. Installation requires standard wrench sizes and PTFE tape or thread sealant on the NPT side; the AN flare side seats without additional sealant. Verify NPT port location and available clearance before ordering to ensure proper routing of fuel or cooling lines.