Endura Coupler Fitting #6 45 Degree

The Endura Coupler Fitting #6 45 Degree is a precision hydraulic and fuel line adapter built for serious automotive builders and mechanics who demand reliability in high-pressure applications. This Russell component serves as a 6 AN female swivel-to-female swivel coupling at a 45-degree angle, making it essential for custom fuel systems, coolant loops, and brake line installations where space constraints or routing efficiency requires directional flow management. Whether you're fabricating a fuel injection system for a performance engine swap, integrating a remote oil cooler, or building a custom cooling circuit, this fitting provides the directional control needed without compromising line integrity.

Machined from aluminum and finished with nickel anodization, the Endura Coupler resists corrosion while maintaining lightweight construction critical for engine bay real estate. The 45-degree geometry allows hose runs to navigate tight engine compartments, suspension towers, and firewall passages without sharp bends that reduce flow or create pressure-induced failures. Both ports feature female swivel ends, enabling quick-disconnect couplers or threaded male adapters to be installed on either side—a design that simplifies assembly, allows for future modifications, and reduces the risk of cross-threading under pressure. Russell's manufacturing tolerances ensure leak-free sealing at working pressures typical of fuel delivery (up to 100+ psi), brake systems, and auxiliary cooling circuits.

This fitting is ideal for fabricators and enthusiasts building carbureted-to-fuel-injected conversions, turbo fuel system upgrades, or custom water cooling setups on high-horsepower platforms. Its compact footprint (2.55 x 1.65 x 4.85 inches) and minimal weight (0.08 lbs) make it suitable for engine bays where every inch counts. The 6 AN port size is the industry standard for fuel systems on vehicles ranging from classic hot rods to modern LS and small-block swaps, ensuring compatibility with OEM and aftermarket line assemblies, quick-disconnect couplers, and fuel pressure regulators. Installation requires only two wrenches and a basic understanding of AN line assembly—no special tools needed, making it accessible for both experienced shops and home garage projects.