6AN 303 Series SS PTFE Hose 6ft SS

The 6AN 303 Series SS PTFE Hose 6ft SS from REDHORSE PERFORMANCE is purpose-built for serious engine builders, fuel system upgrades, and high-performance automotive modifications. Whether you're routing fuel lines through a custom fuel injection setup, upgrading your carburetor feed system, or installing a complete fuel delivery system in a modified engine, this hose assembly delivers the reliability that professionals demand. The 6-foot length accommodates flexible routing in tight engine bays, making it ideal for street machines, race cars, and heavily modified builds where stock fuel line routing won't work.

This hose features a stainless steel construction with a PTFE (polytetrafluoroethylene) core, which resists fuel degradation, maintains structural integrity under pressure fluctuations, and handles ethanol-blend fuels without swelling or deterioration. The 303 series designation indicates reinforced construction rated for demanding flow conditions and temperature cycling common in fuel systems running premium gasoline, race fuel, or alternative blends. Stainless steel fittings ensure corrosion resistance and clean aesthetics in visible engine bay installations, while the PTFE inner tube prevents fuel contamination and eliminates permeation—critical when building fuel systems for longevity and safety in performance engines pushing higher pressures.

Mechanics and engine builders trust REDHORSE PERFORMANCE hose assemblies for fuel injection conversions, EFI retrofits on carbureted engines, and fuel system restorations on classic cars receiving modern fuel delivery upgrades. The 6AN fitting size (9/16-inch diameter opening) integrates seamlessly with standard fuel rail adapters, fuel pressure regulators, and aftermarket fuel pump assemblies common in the performance modification market. Installation is straightforward—simply connect both ends to your fuel system components, ensure proper support along the routing path to prevent vibration wear, and conduct a thorough pressure test before running the engine. This assembly is an essential component for anyone serious about fuel system reliability in modified vehicles.