Adapter Fittings 1/8 NPT to 1/4 Line 4pk

The ALLSTAR PERFORMANCE Adapter Fittings 1/8 NPT to 1/4 Line 4-pack (ALL 50121) provides four brass adapter fittings designed to bridge incompatible fluid line connections in fuel, oil, and coolant systems. These straight adapters convert a 7/16-20 inverted flare female connection to a 1/8 inch NPT male thread, making them essential for custom fuel system fabrication, engine swap applications, and hydraulic line modifications where standard fittings won't achieve a proper seal.

Constructed from natural brass, these hardline adapters deliver reliable performance in high-pressure fuel and fluid transfer applications. The brass material provides excellent corrosion resistance and pressure handling characteristics common to performance fuel system standards. The straight-port design eliminates unnecessary bends in the hardline routing, reducing flow restriction and maintaining system integrity. The 7/16-20 inverted flare connection is the metric standard for vintage and modern performance fuel hardlines, while the 1/8 NPT male outlet accommodates gauge sensors, relief valves, or distribution block connections. A four-pack quantity ensures you have spares on hand for multiple system configurations or replacements.

These adapters serve drag racing, street rodding, engine rebuild, and high-performance automotive projects where precise fluid system plumbing is critical. Technicians building custom fuel systems from individual hardline segments rely on quality adapter fittings to avoid leaks, pressure loss, and component failure under sustained load. The NPT-to-flare configuration solves a common problem: connecting modern component ports (threaded NPT) to traditional hardline systems (inverted flare), a requirement that appears frequently in LS swaps, supercharger installations, and fuel system retrofits.

ALLSTAR PERFORMANCE is recognized for supplying the racing and restoration community with precision fluid system components built to withstand competition and daily-driven performance applications. The SKU ALL 50121 identifies this as an OEM-equivalent replacement or upgrade component suitable for builders and technicians who demand exact fitment and thread specification.