EVIL ENERGY 300LPH External Inline Fuel Pump 12V High-Flow for EFI — Compact, Multi-Fuel

EVIL ENERGY External Inline Fuel Pump is a 12V, high-flow 300LPH inline pump built for EFI systems that delivers consistent fuel pressure and broad fuel compatibility for performance and replacement applications.

This compact external inline pump fits beneath the tank or along the frame and is engineered for 12V electronic fuel-injection (EFI) setups. Tested to deliver up to 300 LPH at higher input voltage and rated for continuous operation across extreme temperatures, it’s sized and specced for street, track, and retrofit uses. The unit includes adapters, wiring terminals, gaskets and hardware to simplify installation and decrease downtime.

How does this pump perform in real-world pressure and flow conditions?

The EVIL ENERGY pump is tested at multiple voltages and backpressures to reflect typical EFI demands. You can expect about 200 LPH at 75 PSI and 12V, 255 LPH at 43 PSI and 12V, and up to 300 LPH at 43 PSI when run at 13.5V. Its 75 PSI operating pressure rating and broad temperature tolerance mean steady delivery under load.

• Flow ratings: 200 LPH @ 75 PSI (12V), 255 LPH @ 43 PSI (12V), 300 LPH @ 43 PSI (13.5V)
• Operating pressure: up to 75 PSI for common EFI systems
• Temperature range: -68°F to 194°F for diverse climates and conditions

Which fuels and systems is this pump compatible with?

This inline pump is made for gasoline-powered EFI installations but also accepts a range of fuel types. It is compatible with pump gas, race gas and diesel, making it versatile for swaps, upgrades or multi-fuel builds. Note: intended for 12V DC EFI systems only.

• Designed specifically for 12V DC electronic fuel-injection systems
• Accepts gasoline, pump gas, race gas and diesel
• Not intended for non-EFI applications or other voltage systems

What comes in the box and how difficult is installation?

The pump ships with a complete hardware kit to speed installation and reduce trips to the parts store. You’ll receive adapters for inlet and outlet lines, wiring terminals, mounting gaskets and fasteners plus a user manual with guidance. Best practice is to mount the pump below the fuel tank for gravity-assisted feed and consistent priming.

• Included: pump, 2 gaskets, washer, 2 nuts, 2 insulated terminals
• Adapters: 10AN inlet and 6AN outlet for common hose setups
• Extras: 2 rubber connection covers and a user manual for wiring and mounting tips

How durable is the pump for performance or daily-driving use?

The construction and test specs emphasize durability across thermal extremes and continuous duty scenarios. The wide operating temperature window and proven flow at elevated voltage make it suitable for repeated starts, highway runs and performance conditions. Proper mounting and fuel filtration will maximize service life.

• Engineered for continuous duty within -68°F to 194°F operating range
• High-flow capability supports upgrades and higher-demand setups
• Use with an inline filter and correct wiring to preserve longevity

Who is this for: The EVIL ENERGY 300LPH External Inline Fuel Pump is aimed at mechanics, tuners and DIY vehicle owners upgrading or replacing fuel-system components on 12V EFI engines. It suits streetcars needing higher flow, race vehicles requiring reliable delivery, and anyone converting or retrofitting fuel systems where an inline, below-tank installation is preferred. If you run aftermarket fuel rails, higher-output injectors, or simply need a dependable replacement pump with included hardware, this unit provides a compact, tested solution.