Straight Adapter Fitting -3AN x 1/4in NPT

The Straight Adapter Fitting -3AN x 1/4in NPT from Vibrant Performance is a critical hydraulic connector engineered for fuel system, coolant circuit, and brake line applications in modified and performance vehicles. This adapter bridges -3AN hose sizes to standard 1/4-inch NPT threaded ports, making it indispensable when integrating aftermarket fuel pressure regulators, gauge blocks, or remote filter mounts into OEM or custom plumbing configurations. Whether you're upgrading a fuel system for forced induction or installing precision gauges in a performance build, this straight fitting ensures leak-free connections in high-vibration environments.

Constructed with precision-machined aluminum or zinc-plated steel construction, the -3AN x 1/4in NPT adapter delivers corrosion resistance and durability in under-hood conditions. The straight body design eliminates unnecessary flow restrictions while the dual-thread geometry—AN (aerospace-standard) on one end and NPT (National Pipe Thread) on the other—allows seamless integration across different plumbing standards commonly found in OEM and aftermarket fuel rails, coolers, and accessory blocks. Vibrant Performance's tight manufacturing tolerances ensure proper sealing with standard -3AN hose clamps and NPT port fittings, reducing the risk of pressure leaks that compromise engine performance or safety.

Mechanics and tuners favor this adapter for custom fuel system plumbing, turbo coolant line routing, and gauge installation on street, drag, and endurance build platforms. It's compatible with fuel systems operating up to typical pump pressures (60+ PSI) and works with braided stainless or rubber -3AN hose and existing NPT-threaded ports on fuel blocks, dampers, and distribution manifolds. Proper installation requires thread-seal tape on the NPT end and a wrench to secure both ends; verify your hose and port sizes before ordering to ensure correct fitment and safe operation under load.