-4AN Female to -4AN Male 45 Degree Swivel Adapter

The -4AN Female to -4AN Male 45 Degree Swivel Adapter (MPN 10771) is a precision hydraulic fitting engineered for custom fuel, coolant, and brake line routing in high-performance engine builds and modified vehicles. This adapter exists to solve the real-world problem every serious mechanic encounters: running hard-line AN plumbing through tight engine bays where direct hose runs create kinks, pressure drops, and catastrophic leaks. Whether you're building a supercharged stroker, a twin-turbo swap, or a standalone fuel injection system, swivel adapters eliminate the need for multiple 90-degree bends that compromise flow and reliability.

This swivel adapter features a 45-degree fixed elbow design that allows the male AN fitting to rotate freely within the female socket, enabling fine-tuning of line orientation after installation without breaking torque on the connection itself. The compact 3.54 x 1 x 6.3 inch footprint and lightweight 0.02 lbs construction make it ideal for space-constrained applications like engine bay modifications where every millimeter counts. The -4AN sizing (standard 1/4-inch hose diameter) handles 3000+ PSI continuous flow in fuel systems and maintains full flow capacity in coolant bypass circuits, making it suitable for both street and race applications that demand durability and reliability.

This adapter benefits engine builders, fuel system integrators, and DIY enthusiasts installing custom plumbing on LS swaps, drift cars, road racing builds, and turbo conversions. It pairs seamlessly with braided stainless steel -4AN hose and matches OEM Vibrant Performance standards for thread pitch and seal compatibility. Install with a wrench on both the female and male ends to prevent line twisting; the swivel action protects against over-tightening while ensuring leak-free operation under sustained boost or high-volume fuel delivery. For any custom powertrain requiring precision AN plumbing in confined spaces, this 45-degree adapter delivers the flexibility and reliability that separates a professional install from amateur guesswork.