4AN to 2AN 1/8NPT Straight Male to Male

The 4AN to 2AN 1/8NPT Straight Male to Male fitting is a crucial hydraulic adapter designed for custom fuel, oil, and coolant line systems in performance vehicles and engine builds. This product is essential for mechanics and automotive enthusiasts who work on modified engines, ensuring proper hose sizing and adapter specifications to maintain system integrity under load.

This straight fitting effectively bridges two different AN (Army-Navy) line sizes while incorporating 1/8" NPT (National Pipe Thread) ports. It allows for a seamless transition between larger 4AN supply lines and smaller 2AN branch lines without compromising flow or introducing weak points in your fuel delivery or cooling circuit. The male-to-male configuration and straight design make it ideal for inline applications where space is limited.

This fitting is particularly beneficial for custom fuel systems, aftermarket fuel rails, remote oil filtration mounts, and auxiliary cooling loops. It ensures secure connections to female-ported components on both ends, while the NPT threads accept adapters, gauges, or relief valves for pressure monitoring and system control. Its durable, leak-resistant design withstands pressure spikes common in turbocharged, supercharged, and high-RPM naturally aspirated builds.