Adapter Fitting Aluminum -4AN to 1/8in NPT

The Adapter Fitting Aluminum -4AN to 1/8in NPT from ALLSTAR PERFORMANCE is a precision gauge adapter designed for fluid systems requiring reliable pressure or vacuum measurement connections. This straight fitting bridges two industry-standard port types—4 AN male threads and 1/8 inch NPT female threads—making it essential for fuel systems, oil pressure monitoring, air suspension setups, and performance engine builds where gauge installation demands compatibility between different thread standards. Whether you're installing a fuel pressure gauge on a high-performance engine or connecting instrumentation to a custom fuel system, this adapter eliminates the need for multiple fittings or custom modifications.

Constructed from aluminum and finished in black anodized coating, the adapter provides corrosion resistance and a clean appearance while maintaining lightweight characteristics ideal for motorsports and racing applications. The straight geometry ensures minimal flow restriction and straightforward installation without offset complications. The AN -4 male connection accommodates standard -4 hose barbs and fittings common in performance fuel systems, while the 1/8 inch NPT female port accepts standard gauge ports, pressure relief adapters, and sensor connections found on instrumentation panels. Black anodizing protects the aluminum from oxidation and chemical exposure typical in engine bays and fuel system environments.

This adapter benefits engine builders, performance technicians, and motorsports enthusiasts who demand precise gauge feedback for fuel pressure, oil pressure, or boost monitoring. Common applications include EFI fuel system installations, turbo setups requiring pressure validation, nitrous oxide systems, and custom engine builds where OEM gauge ports differ from aftermarket manifold specifications. The compact 3.5 x 0.6 x 4.5 inch profile integrates easily into tight engine bay layouts. Installation requires only a standard wrench for secure connection to both the AN line and NPT gauge port—no special tools needed for straightforward integration into existing or new fuel and fluid systems.