EVIL ENERGY 12V EFI Inline Fuel Pump 300LPH - External High-Flow, 75 PSI Rated

EVIL ENERGY's external inline fuel pump is a 12V EFI-compatible high-flow fuel delivery unit rated up to 300 LPH at specified voltages and pressures.

This compact pump is engineered for electronic fuel-injected (EFI) applications where a reliable, consistent fuel supply is required. Built to operate across a wide temperature range and compatible with multiple fuel types, it includes mounting hardware and fittings to simplify installation. The specification sheet emphasizes measured flow at different voltages and pressures, so you can match the pump to aftermarket fuel systems, performance upgrades, or replacement needs.

How much flow and pressure can I expect from this pump?

The EVIL ENERGY pump delivers variable flow depending on system voltage and backpressure: tested at 200 LPH at high backpressure and up to 300 LPH under nominal conditions. It is rated to withstand operating pressures as high as 75 PSI, making it suitable for many EFI setups. These measured points help you plan for fuel rail demand and regulator settings.

• Tested flow: 200 LPH at 75 PSI and 12V
• Tested flow: 255 LPH at 43 PSI and 12V
• Tested flow: 300 LPH at 43 PSI and 13.5V
• Maximum operating pressure: 75 PSI

What fuels and environments can this inline pump handle?

This pump is compatible with gasoline variants and diesel, making it flexible for street, race, and utility applications. Its components are designed to operate from extreme cold to high heat, accommodating vehicles used year-round or in motorsport environments. Avoid using fuels or additives not specified by your engine builder or regulator to maintain longevity.

• Compatible with gasoline, pump gas, race gas, and diesel
• Operating temperature range: -68°F to 194°F
• Sealed design suitable for exposed engine bays when mounted correctly
• Not intended for non-standard fuels without prior compatibility checks

How should I install the EVIL ENERGY inline fuel pump for best results?

For dependable priming and reduced noise, install the pump below the fuel tank so gravity assists fuel feed to the unit. The kit ships with a mounting bracket, gaskets, adapter fittings and terminals to make a clean installation, and the manual provides wiring and plumbing guidance. Position the pump to avoid excessive heat sources and secure hoses with appropriate clamps.

• Recommended: mount below tank for gravity-fed supply
• Included hardware: bracket, gaskets, nuts, washer, and terminals
• Adapters: 10AN inlet and 6AN outlet included for hose compatibility
• Follow wiring instructions in the manual for 12V operation

Will this pump suit performance upgrades on my EFI vehicle?

If your engine's fuel demand falls within the pump's flow ratings, this unit is a solid choice for moderate performance increases or as a robust OEM replacement. Check injector sizing, fuel pressure regulator settings, and desired power targets to confirm compatibility. The tested flow figures at different voltages help you estimate headroom for tuning or forced-induction applications.

• Suitable for many mid-range performance upgrades
• Use test flow data to match injector and rail requirements
• Works well as a replacement for failing inline pumps in EFI systems
• Not a direct drop-in for extreme high-horsepower builds without verification

Who is this for: The EVIL ENERGY 300LPH external inline fuel pump is aimed at DIY mechanics, tuners, and performance enthusiasts running 12V EFI systems who need a dependable high-flow replacement or upgrade. It’s also useful for restorations and motorsport prep where a compact, hardware-inclusive pump with clear tested flow figures is required. If your setup requires flows beyond the published ratings, consult a fuel system specialist to select an appropriately sized unit.