3AN FM-FM swivel Coupler Red Blue

The 3AN FM-FM swivel coupler in red and blue from REDHORSE PERFORMANCE is a precision fluid-line adapter designed for custom fuel, coolant, and brake system plumbing in high-performance vehicles. It is specifically built for builders and mechanics working on fuel-injected engines and turbocharged applications.

This swivel coupler eliminates the need for separate bulkhead fittings, reducing assembly time in tight engine bays. The integrated swivel joint allows for 360-degree rotation without disconnecting, accommodating vibration and thermal expansion cycles, which helps extend the service life of fuel rails, heater cores, and brake distribution blocks.

The FM-FM configuration denotes female-to-female AN threads, making it compatible with standard AN male fittings on both ends. This coupler is particularly useful for fuel system retrofits and modifications, ensuring leak-free seals when properly installed with appropriate sealing washers.