EVIL ENERGY fuel injection hose 5/16" SAE 30R9 — 25 ft, 300 PSI FKM inner for ethanol & diesel resistance

EVIL ENERGY 5/16" SAE 30R9 fuel injection hose is a 25-foot, high-temperature, 300 PSI-rated FKM/ECO hose engineered for modern fuel systems including ethanol blends and diesel.

This fuel injection line is built to the SAE J30R9 specification for reliable service in high-pressure fuel systems, LS swaps, fuel pumps, filters, tanks and vapor management. With a fluorine rubber inner tube and epichlorohydrin cover reinforced by aramid fiber, the hose balances chemical resistance and abrasion protection while remaining flexible across a wide temperature range. It’s designed to accept common fuel types such as gasoline, E10–E85, biodiesel and diesel without premature degradation.

How does this hose handle different fuels and ethanol blends?

The hose uses an FKM (fluorine rubber) inner compound that resists swelling and softening when exposed to modern oxygenated fuels. ECO cover material and aramid fiber reinforcement add durability against external wear and pressure cycling. Together, these materials let the hose work with gasoline, E10–E85, biodiesel and diesel safely within rated limits.

• FKM inner tube for strong chemical resistance to ethanol and biodiesel
• Compatible with E10, E15, E85, diesel and conventional gasoline
• Aramid fiber reinforcement for higher burst and fatigue strength

What pressure and temperature ranges can I expect?

This 5/16" hose is rated for 300 PSI working pressure with a 1200 PSI burst pressure, providing a large safety margin for fuel injection systems. Temperature capability ranges from -40°F up to 275°F in continuous service, with short-term tolerance to about 302°F. Those parameters make it suitable for under-hood installations and proximity to hot engine components.

• Working pressure: 300 PSI; burst: 1200 PSI
• Temperature range: -40°F to 275°F (short-term 302°F)
• Minimum bend radius: 2.52 inches (64 mm) for routing in tight spaces

Will this hose fit my system and how is it sized?

The hose has a 5/16 inch (approx. 8 mm) inner diameter with a 0.55 inch (14 mm) outside diameter and manufacturing tolerances accounted for. It comes as a 25-foot length to allow multiple runs or custom cut-to-length installations. The SAE J30R9 construction means it is backward-compatible with many 30R7 and 30R6 applications often found on modern vehicles and swaps.

• ID: 5/16" (8 mm) with ±0.4 mm tolerance
• OD: 0.55" (14 mm) with ±0.5 mm tolerance; length: 25 ft
• Designed to meet SAE J30R9 and compatible with 30R7/30R6 systems

Who is this for: EVIL ENERGY’s 5/16" SAE 30R9 hose is aimed at mechanics, performance builders and DIY enthusiasts needing a durable, ethanol-compatible fuel line for fuel injection systems, LS engine swaps, fuel pumps, filters and vapor or return lines. It suits both everyday street cars and higher-demand setups where chemical resistance, temperature tolerance and pressure reliability matter. If you need a long run of premium-rated hose to cut and install to exact lengths or to carry multiple feeds, this 25-foot roll offers flexibility and industry-standard performance without compromising on material quality.