TREXFLOW TF SAE 30R9 Fuel Injection Hose 3/8" ID 5FT — 300 psi, FKM Inner for Ethanol Resistance

TREXFLOW TF SAE 30R9 3/8" fuel line hose is a 5-foot, high-pressure push-on hose engineered for fuel-injection and vapor-control lines, rated to handle up to 300 psi and wide temperature extremes without fuel permeation.

This hose combines a fluoroelastomer inner tube, aramid braid reinforcement and an epichlorohydrin outer cover to resist ethanol-blended fuels, racing fuels and many petrochemical fluids while preserving flexibility from -40°F to 300°F (-40°C to 150°C). It is manufactured to SAE J30 R9 performance and produced under ISO 9001 / IATF 16949 quality systems for consistent dimensions, pressure capability and fuel impermeability.

How does this hose stand up to ethanol and modern blended fuels?

The SAE 30R9 construction uses a fluoroelastomer (FKM) inner layer and a fuel-impermeable formulation that resists deterioration, hardening and vapor permeation caused by ethanol and other aggressive fuel blends. That means fewer leaks and less odor migration compared with conventional rubber hoses.

• Inner FKM fluoroelastomer for chemical resistance
• Epichlorohydrin outer cover to resist weather and abrasion
• Designed and rated SAE J30 R9 for superior impermeability

Can I use this hose for fuel-injection and pressurized lines?

Yes — the hose is intended for push-on fuel injection plumbing and will handle continuous operating pressures up to 300 psi with a high burst rating. Use it with push-lock style fittings and secure with clamps when recommended or when pressure exceeds 10 psi.

• Rated working pressure: 300 psi
• Not suitable for re-usable cutter-style or crimp AN fittings
• Hose clamps required for smooth barb fittings; recommended for push-locks

What are the thermal and vacuum capabilities of this hose?

This hose keeps pliability and sealing performance at extreme temperatures, from -40°F up to 300°F (approximately -40°C to 150°C). It also maintains vacuum performance useful for PCV and evap lines, supporting stable service in engine compartments and performance applications.

• Operating temperature range: -40°F to 300°F (-40°C to 150°C)
• Vacuum at 20% deflection: 23.9 in/Hg (810 mbar)
• Suitable for crankcase PCV and evap routing (not for submersion in tanks)

What fittings and fluids are compatible with this hose?

The smooth inner fluoroelastomer accepts gasoline, E85, methanol, diesel and many lubricants without rapid degradation. It is designed primarily for use with push-lock fittings; clamps are advised for secure attachment and required above certain pressures.

• Compatible fluids: gasoline, E85+, racing fuels, methanol, diesel, biodiesel blends, lubrication oils
• Use with push-lock style fittings; do not use cutter-style or crimp AN hose ends
• Do not submerge the hose inside fuel tanks

Who is this for: Installers, performance mechanics and vehicle owners who need a reliable, ethanol-resistant fuel line for fuel-injection systems, PCV/evap hoses or high-temperature engine bay runs. It is ideal for applications that demand a compact 3/8" (9.5 mm) inner diameter, high pressure capacity and long-term resistance to fuel permeation, while meeting SAE J30 R9 specifications and automotive quality standards.