Adapter Fitting Bulkhead 90 Deg 4an

The EARLS Adapter Fitting Bulkhead 90 Degree 4AN is a precision hydraulic and fuel line connector engineered for high-pressure applications in performance automotive, aviation, and industrial systems. This 90-degree male-to-male bulkhead adapter connects two 4 AN (AN4) lines at a right angle, enabling compact routing in confined engine compartments and tight installation spaces where straight configurations won't fit. The aluminum construction with black anodized finish provides corrosion resistance and a professional appearance while maintaining the strength required for demanding fuel, oil, and coolant circuits.

The 4 AN thread size handles flows and pressures common in high-horsepower engine builds, turbo systems, and custom cooling loops. The 90-degree bulkhead design eliminates the need for elbows and reduces connection points, lowering the risk of leaks in pressurized systems. Black anodized aluminum resists oxidation in harsh underhood environments and oil vapor exposure. The bulkhead configuration allows the fitting to mount flush through a panel or manifold block, creating clean, organized plumbing that simplifies hose routing and improves serviceability. Precision machining ensures reliable seals when paired with standard AN4 hose assemblies and compatible adapters.

This fitting is built for builders and technicians assembling custom fuel systems, secondary cooling circuits, or high-flow oil circuits in street rods, race cars, marine engines, and aftermarket turbo installations. Users who need to navigate sharp angles or transition lines through firewall panels appreciate the compact bulkhead profile and the rigidity that prevents vibration-induced loosening. The EARLS brand is recognized for precision hose and fitting solutions in performance automotive circles, where reliability under pressure is non-negotiable.