#4 Stl Flare to 1/8 NPT Long

The #4 Stl Flare to 1/8 NPT Long adapter fitting is an essential component for serious boaters and anglers who require reliable connections in pressurized fuel, cooling, or hydraulic systems. This XRP-Xtreme Racing Products adapter effectively bridges AN (Army-Navy) and NPT (National Pipe Thread) connections, making it crucial for integrating aftermarket fuel systems and custom cooling loops.

Constructed from steel with a nickel plating, the #4 Stl Flare to 1/8 NPT Long fitting offers corrosion resistance, making it suitable for both saltwater and freshwater environments. The 4 AN male flare end connects to industry-standard flared hose, while the 1/8-inch NPT male port threads into manifolds, fuel blocks, or engine ports securely. Its long-format design provides additional standoff, reducing sharp bends in tight engine compartments and extending hose life.

Anglers and boaters upgrading from original equipment manufacturer fuel lines to performance fuel injectors will find this adapter particularly beneficial. It ensures leak-free, pressure-rated connections, making it a reliable choice for high-horsepower outboards or inboard-outboard marine engines, especially in high-vibration applications.