TREXFLOW TF SAE 30R9 3/8" Fuel Line Hose 5ft — High-pressure 300 psi, Ethanol-resistant

TREXFLOW TF SAE 30R9 3/8" fuel line is a 5-foot, high-pressure push-on hose engineered for fuel injection systems, compatible with ethanol blends and a wide range of fuels.

This heavy-duty fuel hose combines a fluoroelastomer inner tube, aramid fiber reinforcement, and an epichlorohydrin outer cover to resist fuel permeation, swelling, and aging. Built to SAE J30 R9 standards, it handles harsh fuel blends and elevated temperatures while maintaining flexibility, making it suitable for automotive and motorsport fuel lines when used as a push-on hose.

How does this hose stand up to ethanol and modern fuel blends?

The SAE 30R9 construction uses a fluoroelastomer inner layer designed to resist chemical attack and prevent fuel vapor permeation from ethanol-containing fuels. The composite materials and certification mean it performs reliably with gasoline, E85, methanol, and many racing and diesel blends.

• Inner FKM (fluoroelastomer) layer for chemical resistance
• SAE J30 R9 rating for low permeability
• Tested for compatibility with E85, methanol, diesel, biodiesel blends

What pressure and temperature ranges can I expect in real use?

This 3/8" ID hose is rated for 300 psi working pressure with a high burst capacity, and it remains flexible across an extreme temperature band. That range supports cold starts and high-heat engine compartments without hardening or losing integrity.

• Working pressure: 300 psi
• Burst pressure: approximately 8.3 MPa (rated for safety margin)
• Operating temperature: -40°F (-40°C) up to 300°F (150°C)

Which fittings and installation practices are recommended?

The hose is designed for push-on (push-lock) style fittings; it is not intended for reusable cutter-style or crimp-style AN fittings. Use hose clamps when specified: they’re recommended for push-lock connections and required above 10 psi or when using smooth barb fittings to ensure a secure seal.

• Compatible with push-lock fittings — use hose clamps for added security
• Not for use with reusable cutter-style or crimp AN hose end fittings
• Do not submerge or install inside fuel tanks

How durable is the hose for performance and everyday use?

Reinforced with an embedded aramid fiber braid and protected by an ECO rubber outer cover, the hose resists abrasion, heat aging, and pressure cycling. Quality controls during manufacture meet ISO 9001 and IATF 16949 standards, ensuring consistent dimensional and performance characteristics across runs.

• Aramid braid reinforcement for strength and pressure stability
• Epichlorohydrin (ECO) outer cover resists weathering and abrasion
• Manufactured under ISO 9001 and IATF 16949 quality systems

Who is this hose for? If you build or maintain fuel-injected engines, race vehicles, or high-performance street cars that use ethanol blends, race fuels, or diesel/biodiesel proportions, this TREXFLOW TF SAE 30R9 3/8" hose is suited to your needs. It’s ideal where a flexible, high-pressure push-on line is required and where resistance to fuel permeation, heat, and chemical exposure matters. Avoid using it submerged in tanks and pair it with the correct push-lock fittings and clamps for reliable, long-lasting service.