4AN Straight PTFE Reusable Hose End Blue

The 4AN Straight PTFE Reusable Hose End Blue from REDHORSE PERFORMANCE is a precision-engineered fitting designed for high-flow fuel and fluid delivery systems in performance automotive applications. Built for mechanics and enthusiasts upgrading fuel systems, turbo boost lines, and custom plumbing on street machines and race vehicles, this straight hose end connector provides the reliability and repeatability that professional-grade fuel injection and forced induction demand. Whether you're installing a fuel surge tank, upgrading to braided stainless steel hose, or running a full custom fuel system, a quality hose end fitting is non-negotiable for consistent pressure, safety, and performance.

This 4AN fitting features a straight configuration with PTFE (polytetrafluoroethylene) inner core material, which resists corrosion, maintains flex at temperature extremes, and eliminates metal-to-hose fatigue. The aluminum body is anodized in a distinctive blue finish for both corrosion resistance and quick system identification during assembly and maintenance. The reusable design allows you to disconnect and reconnect without sacrificing the fitting—a critical advantage when troubleshooting fuel systems or swapping components on the dyno. The 4AN size (1/4" nominal) is the industry standard for medium-flow fuel applications, boost lines, and return systems on naturally aspirated and turbocharged engines up to approximately 500 hp on gasoline platforms.

Professional mechanics, fuel system builders, and weekend fabricators trust REDHORSE fittings for their durability and precision fit. This straight hose end pairs seamlessly with 4AN braided PTFE hose and 4AN female ports on fuel blocks, regulators, and component manifolds. Installation requires no special tools—hand-tighten first, then use a wrench on the fitting body while supporting the component to prevent damage. Stock this compact, lightweight fitting (0.07 lbs) as part of your fuel system upgrade kit for reliable pressure containment and vibration resistance under boost or high-volume pump conditions.