4AN/JIC Swivel Coupler Red/Blue

The 4AN/JIC Swivel Coupler Red/Blue from REDHORSE PERFORMANCE is a precision-engineered adapter fitting designed for high-performance fuel, oil, and coolant line applications in custom automotive builds. This straight 4 AN female-to-female connector bridges two hose or line segments with a 360-degree swivel design, eliminating installation stress and simplifying routing in tight engine bays. Whether you're building a dedicated fuel system for a turbocharged engine, upgrading cooling lines on a modified street car, or fabricating a custom hydraulic circuit, this coupling delivers the reliability and flexibility that serious enthusiasts demand.

Constructed from lightweight aluminum with dual anodized red and blue finish, this 8100-series fitting combines durability with corrosion resistance—critical in harsh under-hood environments and systems exposed to fuel or coolant. The JIC (Joint Industry Council) female thread standard ensures compatibility with industry-standard AN fittings and adapters, while the swivel joint allows ±45-degree directional adjustment without twisting the connected hose, reducing fatigue on barbed or crimped AN line ends. Weighing just 0.06 lbs, the compact 2.75-inch body fits seamlessly into space-constrained applications, from supercharger intercooler plumbing to differential cooler circuits on dedicated track builds.

This adapter is indispensable for fabricators, engine builders, and performance shops working on fuel system upgrades, turbocharger installations, or custom cooling loops. Its dual-color anodizing simplifies line identification in complex multi-circuit systems, streamlining diagnostics and maintenance. The swivel design is especially valuable in engine bay modifications where line routing cannot accommodate rigid adapters, and its 4 AN capacity handles high-flow applications up to typical performance fuel pump pressures (40–60 PSI) and coolant circulation systems.