Hose End Fitting PTFE Straight -4AN

The Hose End Fitting PTFE Straight -4AN from VIBRANT PERFORMANCE is an essential component for any serious fuel system or hydraulic line upgrade on a performance or modified vehicle. Whether you're building a custom fuel injection setup, installing a high-flow fuel system, or plumbing nitrous oxide lines, this straight hose end fitting delivers reliable, leak-free connections where precision matters. Designed for mechanics and enthusiasts who demand durability and consistent performance under pressure, this fitting eliminates the guesswork and failure points common in amateur fuel system modifications.

The -4AN designation indicates a 1/4-inch nominal hose ID rating—a standard across professional-grade fuel and coolant systems—while the PTFE (polytetrafluoroethylene) construction of the hose ensures chemical resistance and compatibility with ethanol blends, methanol, gasoline, and synthetic fluids without degradation. The straight configuration allows for direct hose connection without bends, simplifying installation in tight engine bays and reducing turbulence losses. VIBRANT PERFORMANCE's precision-engineered threading and swaged construction guarantees a consistent, compression-style seal that withstands both high fuel pressure (typical EFI systems at 40+ PSI) and vibration-induced loosening, a critical factor in modified vehicles where engine movement and thermal cycling are amplified.

This fitting is ideal for fuel system builders, turbo engine conversions, supercharger retrofits, and any application requiring AN-standard plumbing—from LS engine swaps to modern EFI conversions in vintage platforms. Mechanics integrating aftermarket fuel injectors, fuel pumps, or fuel pressure regulators depend on these fittings to eliminate fuel seepage, maintain system pressure stability, and reduce the risk of fuel starvation during hard acceleration. Pair this straight hose end fitting with matching AN adapters and lines to complete a professional-grade fuel delivery system that will outlast aggressive tune and modification cycles.