EVIL ENERGY 5/16" Fuel Injection Hose 25ft SAE 30R9 — FKM Core, 300 PSI Working Pressure

This hose is engineered for modern fuel applications where chemical resistance, heat tolerance, and reliable pressure performance matter. With a fluorine rubber (FKM) inner tube, epichlorohydrin (ECO) cover and aramid reinforcement, it supports gasoline blends and many diesel fuels while meeting SAE J30R9 requirements. The 5/16" (8 mm) internal diameter and 25-foot length make it suitable for engine bays, swaps, and extended routing in performance and replacement installations.

How does this hose handle pressure and temperature extremes?

The EVIL ENERGY 5/16" hose is rated for a continuous working pressure of 300 psi and a burst pressure of 1200 psi, offering a wide safety margin for fuel injection and pressurized fuel systems. Temperature endurance ranges from -40°F up to 275°F, with intermittent exposure allowed to 302°F, so it tolerates hot engine compartments and seasonal cold.

• Working pressure: 300 psi
• Burst pressure: 1200 psi for safety margin
• Temperature range: -40°F to 275°F (intermittent to 302°F)
• Minimum bend radius: 2.52 inches (64 mm) to avoid kinking

Is this hose compatible with modern fuels and additives?

The inner FKM compound and ECO outer cover were selected for chemical resistance across a broad range of fuels and additives. It’s compatible with gasoline, ethanol blends including E10, E15 and E85, biodiesel, and diesel, reducing swelling or degradation that can occur with inferior materials.

• FKM inner resists ethanol and alcohol-blended fuels
• Works with biodiesel and diesel formulations
• Suitable for systems using fuel additives and detergents
• Designed to meet SAE J30R9 for fuel-injection applications

What sizes and installation details should I know before buying?

This hose has an internal diameter of 5/16" (8 mm) and an outer diameter of 0.55" (14 mm) with manufacturing tolerances specified for reliable fittings. A 25-foot length gives installers flexibility for long runs or multiple connections; observe the 2.52" minimum bend radius and choose compatible clamps and fittings rated for 30R9 service.

• Inside diameter: 5/16" (8 mm), tolerance ±0.4 mm
• Outside diameter: 0.55" (14 mm), tolerance ±0.5 mm
• Length: 25 feet for extended routing or cuts
• Use SAE 30R9-compatible fittings and clamps to maintain rating

Where can this hose be used within a vehicle or system?

The hose is tuned for fuel injection systems but is also suitable for fuel filters, pumps, tanks, vapor management lines, oil cooling feed/return in some setups, and transmission connections where SAE 30R9 material is acceptable. Its abrasion-resistant cover and reinforced construction make it useful in performance swaps and aftermarket installs, including LS swaps and custom routing jobs.

• Fuel injectors, fuel rails and inline fuel filters
• Fuel pumps, fuel tanks, and vapor-emission lines
• LS swaps and custom engine bay routing
• Compatible with oil cooling and transmission lines in suitable systems

Who is this for: Builders, performance tuners, mechanics, and DIY enthusiasts needing a durable, chemically resistant fuel line that meets SAE J30R9. If you require a long, flexible 5/16" fuel hose for modern ethanol and diesel blends, and you want an option with strong pressure and temperature ratings, this EVIL ENERGY 25-foot hose is designed to deliver reliable, service-grade performance in demanding installations.