AN To NPT 45 Degree -4 x 1/8in

The AN To NPT 45 Degree -4 x 1/8in fitting from Allstar Performance is a critical adapter for custom fuel, oil, and coolant line routing in high-performance engine builds. This fitting bridges two industry-standard thread types—JIC AN (Army-Navy) and NPT (National Pipe Thread)—allowing you to integrate components with mismatched port configurations without custom fabrication. Whether you're retrofitting a fuel injection system, installing a remote oil filter, or plumbing a custom cooling circuit, this adapter eliminates the need for expensive machine work and reduces installation time.

Constructed with precision engineering, the 45-degree angle design prevents vibration-induced leaks and optimizes hose routing in tight engine compartments common on modern performance platforms. The -4 sizing refers to the JIC AN port (rated for 1/4-inch hose), while the 1/8-inch NPT thread accommodates standard gauges, sensors, and gauge blocks. Allstar Performance's manufacturing standards ensure leak-free sealing when properly installed with appropriate thread sealant, delivering the reliability demanded in competition and street applications alike. The compact 2.65-inch length fits seamlessly into crowded engine bays without requiring spacers or additional adapters.

This fitting benefits builders working on EFI conversions, fuel system upgrades, and custom cooling systems across domestic and import platforms. Installation requires basic hand tools and familiarity with thread sealant application—Teflon tape or liquid thread sealant on the NPT side prevents weeping under pressure. The lightweight design (0.03 lbs) makes it ideal for weight-conscious builds, while its universal compatibility spans carbureted retrofits, fuel cell installations, and aftermarket engine swaps. Verify your system's operating pressure and hose sizing before ordering to ensure proper fit and safe operation.