12AN to 12AN(3/4)NPT Union Adapter 90

The REDHORSE PERFORMANCE 12AN to 12AN (3/4) NPT Union Adapter 90 degree fitting is an essential component for custom fuel systems, cooling systems, and hydraulic line routing in performance vehicles and engine builds. As a mechanic working with modified platforms—whether you're handling turbocharged setups, custom fuel injection systems, or high-flow cooling circuits—you need reliable adapters that manage pressure transitions without leakage or flow restriction.

This 90-degree union adapter bridges two different port standards (12AN flange to 3/4-inch NPT pipe thread) while maintaining the 12AN size, allowing you to connect incompatible thread types seamlessly in tight engine compartments or under-vehicle installations. REDHORSE Performance adapters are manufactured from high-strength aluminum alloy with precision-machined threads and internal passages designed to minimize turbulence and pressure loss. The 90-degree elbow geometry reduces installation footprint and accommodates angular port orientations without requiring flexible hose runs or complex bend patterns.

The adapter's compact dimensions (2.8 x 1.4 x 3.8 inches) and lightweight construction (0.18 lbs) make it practical for tight underho. The AN port connects via a flange seat with a 37-degree JIC cone, while the 3/4-inch NPT side is designed to accept standard pipe thread fittings—a critical hybrid design when sourcing components from different manufacturers or retrofitting OEM ports to aftermarket equipment.