4AN Swivel Hose Ends Black STR

The 4AN Swivel Hose Ends Black STR from REDHORSE PERFORMANCE is a critical component for any custom fuel, coolant, or hydraulic system in high-performance automotive builds. Designed as a straight-configuration hose fitting, this adapter connects 4 AN hose to a 4 AN female port, making it essential for mechanics and enthusiasts who demand precision plumbing in their engine bay or fuel cell installations. Whether you're upgrading a fuel injection system, building a custom cooling loop, or fabricating a performance fuel system from scratch, the 4AN swivel fitting delivers the reliability and adjustability that professional installations require.

Constructed from lightweight aluminum and finished in black anodize, this 1000 Series fitting combines corrosion resistance with minimal weight penalty—a priority in race-oriented and street-performance applications. The swivel design allows the hose to rotate within the fitting, reducing stress on solder joints and barbed connections during engine vibration and thermal expansion cycles. The straight configuration means no 45° or 90° bends, making it ideal for tight engine compartments where direct line routing is possible. At just 0.06 lbs, the fitting adds negligible mass while maintaining the structural integrity necessary for sustained high-pressure fuel delivery or coolant circulation in forced-induction setups.

Mechanics building domestic muscle cars, import street racers, or vintage hot rods will appreciate the universal compatibility of 4 AN sizing—a standard in modern performance fuel systems and aftermarket cooling solutions. Installation requires crimped or push-lock 4 AN hose on one end and threads directly into any 4 AN female port, making integration straightforward in both OEM-adjacent and fully custom plumbing layouts. The black anodize finish resists oxidation in underhood environments and maintains aesthetics in engine bays where exposed braided hose runs are part of the build identity. For shops and enthusiasts standardizing on AN fittings, stocking multiple straight, 45°, and 90° configurations in 4 AN ensures every custom fuel, coolant, and vacuum line can be executed to spec.