4AN 90Deg Male Adapter to 1/4in NPT Male Blue

The 4AN 90Deg Male Adapter to 1/4in NPT Male Blue from REDHORSE PERFORMANCE is a precision fluid-line fitting engineered for custom automotive fuel, coolant, and hydraulic systems. Mechanics and performance enthusiasts rely on this adapter when transitioning between AN (Army-Navy) tubing standards and traditional NPT (National Pipe Tapered) threaded ports commonly found on carburetors, fuel pressure regulators, and aftermarket gauges. This right-angle configuration saves space in tight engine bays where straight runs aren't practical, making it indispensable for modern engine swaps, fuel system upgrades, and forced-induction builds.

Constructed from aluminum with a vibrant blue anodized finish, this 4AN-to-1/4" NPT adapter combines lightweight durability with superior corrosion resistance and thermal stability. The 90-degree male-to-male configuration eliminates the need for separate elbow fittings and reduces leak points in your plumbing layout. The precise machining of both the 4AN port (smaller cross-section for AN4 hose) and the 1/4" NPT male threads ensures zero-play connections and positive seat engagement, critical when working with fuel under pressure or coolant in high-temperature environments. Redhorse Performance's reputation for meticulous tolerances means this adapter will maintain its seal integrity through decades of thermal cycling and vibration.

This adapter shines in EFI fuel system retrofits, where you're replacing carb-era NPT ports with modern AN braided hose for superior reliability and cleaner aesthetics. Street rod builders, drag racers, and road-course competitors favor Redhorse fittings for their consistency and performance-grade construction. The compact 90-degree design works equally well plumbing coolant lines to auxiliary radiators or routing fuel return lines in custom applications where space constraints demand creative routing. Pair it with AN4 hose and complementary Redhorse fittings to build leak-free systems that withstand boost, heat, and vibration for years of dependable service.