EVIL ENERGY External Inline Fuel Pump 300LPH 12V - High Flow

In this review the EVIL ENERGY External Inline Fuel Pump is evaluated as a budget-minded high-flow option for 12V EFI systems. The bottom line is that it suits hobbyists and racers who need up to 300 LPH at elevated voltage and a durable, compatible pump for multiple fuels. Installation is straightforward with the included bracket and fittings, and the unit's wide operating temperature range makes it useful in demanding conditions, though some users report variability in noise and pressure that deserves attention.

Key Features

• High flow capability: Delivering up to 300 LPH (at 43 PSI & 13.5V) it supports higher-demand EFI setups that need continuous fuel flow.
• Wide fuel compatibility: Works with gasoline, pump gas, race gas, diesel, E85 and alcohol/ethanol so it can be used across many engine applications.
• Robust operating range: Rated to run from -68F to 194F, making it suitable for hot engine bays and cold starts alike.
• Complete installation kit: Ships with a mounting bracket, gaskets, 10AN inlet and 6AN outlet adapters plus terminals and hardware for a straightforward install.
• Designed for EFI systems: Built specifically for 12V DC EFI systems to simplify selection and reduce compatibility guesswork.

Who It's For

The pump is best for automotive enthusiasts, track-day racers, and anyone running modified street engines or aftermarket EFI conversions who need a compact inline unit capable of up to 300 LPH. The included adapters and bracket make it practical for DIY installers who want a mostly plug-and-play external pump.

It is not ideal for electric fuel system shops that require laboratory-grade pressure stability or for builds that demand OEM quiet operation without additional mounting or damping. Buyers who need guaranteed perfect fitment should verify adapter sizes before purchase, since some users reported mismatched fittings.

Pros & Cons

Pros

• High maximum flow supports many high-performance EFI applications.
• Broad fuel compatibility lets the pump work with gasoline, diesel and ethanol blends.
• Complete kit includes bracket, adapters and hardware for faster installation.
• Wide temperature rating helps reliability in harsh conditions.

Cons

• Some customers report mixed results on noise level and pressure consistency, so expect to check pressure with a gauge after installation.
• Fitment can be mixed depending on hose and inlet sizes; verify fittings before final install.

Specifications

Design	External inline fuel pump for 12V DC EFI systems
Test flow	200 LPH @ 75 PSI & 12V; 255 LPH @ 43 PSI & 12V; 300 LPH @ 43 PSI & 13.5V
Operating pressure	75 PSI
Operating temperature	-68F to 194F
Fuel compatibility	Gasoline, pump gas, race gas, diesel, E85, alcohol/ethanol
Included	Pump, mounting bracket, gaskets, washer, nuts, terminals, 10AN inlet, 6AN outlet, covers, manual

Our Verdict

The EVIL ENERGY inline pump is a practical, cost-conscious choice for owners of 12V EFI cars who need up to 300 LPH and broad fuel compatibility. It provides good value when installed below the tank with the supplied hardware, but buyers should confirm fittings and check fuel pressure after installation because a minority of users report noise or pressure inconsistency.

Frequently Asked Questions

Can this pump run E85?
Yes, the pump is compatible with E85 and alcohol/ethanol blends according to the product specifications.

Where should it be installed?
It is recommended to install the pump below the tank to ensure gravity-fed fuel flow and more reliable operation.

Does the package include fittings?
Yes. The package includes a 10AN inlet adapter, a 6AN outlet adapter, bracket, gaskets, terminals and other hardware for installation.