Swivel Coupling Fitting 20an Female Straight

The Swivel Coupling Fitting 20AN Female Straight from EARLS is a precision hydraulic adapter engineered for high-performance fuel, oil, and coolant systems in modified and race vehicles. This fitting serves as a critical connector in custom fuel injection, turbo cooling, and engine management plumbing where flexibility and leak-free connections are non-negotiable. Whether you're building a LS engine swap, upgrading to a high-flow fuel system, or routing lines through a tight engine bay, this swivel coupling eliminates the need for multiple adapters and reduces installation headaches.

Constructed from aerospace-grade aluminum and finished in black anodizing for corrosion resistance, the fitting features a 20 AN female swivel connection on both ends, allowing ±45° movement and vibration absorption without stressing adjacent components or fittings. The swivel design accommodates hose or tube misalignment and thermal expansion cycles—essential when connecting to engine blocks, radiators, or reservoir mounted on rubber bushings. The straight body configuration enables compact installation in congested engine bays while the anodized finish protects against oxidation in high-heat environments and harsh underhood conditions common to fuel system modifications and engine upgrades.

This adapter is ideal for mechanics and fabricators building custom fuel systems, turbocharger coolant loops, and engine bay plumbing on street rods, race cars, and heavily modified trucks. The 20 AN sizing accommodates high-volume, high-pressure applications without flow restriction—making it a go-to fitting for aftermarket fuel pumps rated 150+ PSI and forced-induction cooling systems. Installation requires only standard wrenches, and the swivel female-to-female design accepts both compression-style AN hose fittings and rigid tube adapters, giving you flexibility in your plumbing layout and future modifications.