AN To NPT 90 Degree -4 x 3/8in

The AN to NPT 90 Degree -4 x 3/8in adapter from ALLSTAR PERFORMANCE is an essential fluid or fuel line connector for builders and mechanics working on high-performance engine modifications, fuel injection systems, and custom hydraulic setups. This adapter bridges the gap between AN (Army-Navy) male fittings and NPT (National Pipe Thread) female ports, allowing seamless integration of aftermarket fuel rails, cooling systems, and pressure lines into factory or modified engine bays.

Whether you're upgrading a carbureted engine to EFI or routing custom coolant lines through a modified block, this 90-degree elbow adapter eliminates fitment headaches and ensures leak-free connections. The -4 AN size corresponds to a 7/16-inch OD tubing paired with the 3/8-inch NPT port size, making this adapter ideal for medium-flow applications where precise flow control and durability matter. The 90-degree angle design saves space in tight engine compartments, reducing potential leak points.

Constructed with precision machining, ALLSTAR's adapter maintains structural integrity under boost, fuel pressure spikes, and thermal cycling typical of turbocharged or supercharged applications. The NPT female thread side ensures compatibility with factory block ports, transmission coolers, and OEM manifold connections, while the AN male end accepts standard braided stainless or nylon hose with AN fittings. Mechanics and engineers will find this adapter invaluable for their high-performance projects.