4AN to 2AN(1/8)NPT Adapter 45

The 4AN to 2AN (1/8) NPT Adapter 45 by REDHORSE PERFORMANCE is a crucial fitting for custom fuel systems, coolant lines, and hydraulic applications in high-performance automotive builds. This adapter serves as a vital link between different hose and port standards, specifically converting larger 4AN fittings to smaller 1/8 NPT ports commonly found on fuel pressure regulators and gauges.

Precision-machined from aluminum alloy, this adapter features hard-anodized construction to resist corrosion from fuel, coolant, and road salt while maintaining structural integrity under pressure cycling. The 45-degree angle design allows for natural bends in hose assemblies, which helps to extend component life and reduce leak points, making it ideal for turbocharged or fuel-injected applications running higher system pressures.

This adapter is particularly beneficial for mechanics working with modified engines and aftermarket fuel injection systems, as it simplifies the integration of modern fuel systems into classic cars or when adapting aftermarket components to factory manifolds and blocks. Its compatibility with standard stainless braided hose and reusable or crimped fittings makes installation straightforward for both custom fuel rails and standalone fuel systems.