The best inline fuel pump for EFI depends on your engine’s required fuel flow, operating pressure, voltage, and installation layout. The EVIL ENERGY 300 LPH pump with bracket is suited to a general 12V EFI setup; its 405 LPH model is better for higher-flow builds. For other needs, the YOMIRACING 255 LPH pump includes fittings, the JDMSPEED pump provides mounting hardware, and EVIL ENERGY’s LS assembly combines a pump with a filter regulator.
| Product | Best For | Key Detail |
|---|---|---|
| EVIL ENERGY 300 LPH with bracket | Standard 12V EFI installations | Flow varies with pressure and voltage |
| EVIL ENERGY 405 LPH | High-flow EFI builds | Up to 405 LPH maximum flow |
| YOMIRACING 255 LPH | Modified vehicles needing fittings | Includes two hose fittings |
| JDMSPEED external pump | Buyers needing mounting hardware | Some applications require adaptation |
| EVIL ENERGY LS pump and regulator | Specified LS-series conversions | Integrated filter and 58 PSI regulator |
EVIL ENERGY 300 LPH Pump With Bracket
This external pump is designed for 12V DC EFI systems and includes a 60mm mounting bracket. Its listed test flow is 200 LPH at 75 PSI and 12V, 255 LPH at 43 PSI and 12V, or 300 LPH at 43 PSI and 13.5V. The stated operating pressure is 75 PSI, with an operating temperature range of -68°F to 194°F.
Best for: Buyers who want a 300 LPH-class pump with a bracket included. It supports gasoline, pump gas, race gas, and diesel, according to the product details. Flow changes with system pressure and voltage, so do not treat the maximum figure as its output under every condition.
EVIL ENERGY 405 LPH High-Flow Pump
This 12V EFI pump is intended for high-output applications and is also listed as an OEM-style replacement for 0580254044, described as an 044-style pump. At 12V–13.5V, its stated test flows are 317–365 LPH at 43 PSI and 280–320 LPH at 71 PSI, with a maximum flow of 405 LPH. The pump has a 10AN inlet and 6AN outlet.
Best for: High-flow builds where a 300 LPH-class option may not meet the planned fuel demand. It supports gasoline, pump gas, and race gas; diesel use requires an oil-gas separation system. Confirm the AN connections and required flow at your operating pressure before selecting it.
YOMIRACING 255 LPH Pump With Install Kit
The YOMIRACING pump is listed at 255 LPH and 20 amps. Its metal construction includes the inlet and outlet, which use 10mm x 1mm threads. The kit includes two universal fittings for 5/16-inch hose. The product description identifies it as a popular upgrade for modified vehicles and states support for up to 650 horsepower.
Best for: Buyers seeking a 255 LPH option with hose fittings included. The stated horsepower support is a product claim, not a substitute for matching fuel flow to an engine’s actual requirements. Check the threaded ports, hose size, electrical demand, and system pressure before installation.
JDMSPEED Universal External EFI Pump
This red external pump is described as a universal gasoline fuel-injection replacement. The package includes a mounting clamp, rubber connection covers, terminals, gaskets, nuts, and a bracket bolt. Its listed material is high-density brass and steel alloy.
Best for: Buyers who value included mounting and connection hardware and can verify fitment for their particular setup. The product description cautions that some applications require adaptation, installation requires skill and knowledge, and instructions are not included. Confirm the pump’s specifications match your EFI system before purchase.
EVIL ENERGY LS Pump And Filter Regulator
This product pairs a 300 LPH external inline pump with a fuel filter regulator set to 58 PSI. Its integrated filter element is listed at 10 microns. The stated application is 1999–2014 Chevy 4.8L, 5.3L, and 6.0L LS-series engines, and the pump is for 12V DC EFI systems.
Best for: Buyers working with the listed LS engine range who want a pump and filter regulator in one product. The stated 300 LPH maximum is at 13.5V, and flow can differ at system pressure. Verify the engine application and fuel requirements; the listed compatibility should not be assumed for other setups.
Buying Guide: How To Choose An Inline EFI Fuel Pump
How much flow does your engine need?
Start with the engine’s fuel demand and the pressure at which the pump must deliver fuel. A pump’s maximum flow rating is not necessarily its output at your operating pressure. For example, the EVIL ENERGY 300 LPH pump lists different flow figures at 43 PSI and 75 PSI. Compare flow at the relevant pressure and voltage, rather than choosing by the largest headline number alone.
What pressure, voltage, and connections should you check?
Confirm the pump is intended for your electrical system; the EVIL ENERGY models listed here specify 12V DC EFI. Check required operating pressure, hose diameter or threaded port size, inlet and outlet direction, and available mounting space. The YOMIRACING model lists threaded ports and 5/16-inch hose fittings, while the 405 LPH EVIL ENERGY model lists 10AN and 6AN connections.
Do you need a bracket, fittings, or regulator?
Included hardware can affect installation planning. The 300 LPH EVIL ENERGY option includes a bracket, the YOMIRACING kit includes two hose fittings, and the JDMSPEED package lists mounting and connection hardware. The LS assembly combines a pump with a 58 PSI filter regulator. Check the exact package contents and whether additional parts or adaptation will be needed.
Which fuel can the pump handle?
Check the listed fuel compatibility before choosing. Product details for several pumps list gasoline, pump gas, race gas, and diesel, but diesel conditions can vary by model. The 405 LPH model specifies that diesel applications require an oil-gas separation system. Do not assume every pump supports every fuel without checking its product specifications.
Frequently Asked Questions
Can an inline fuel pump be used with EFI?
Yes, if the pump is designed for EFI and can supply the required flow at the system’s operating pressure. Verify voltage, pressure, fuel compatibility, and connections for the specific model.
Does a 300 LPH rating mean the pump always delivers 300 LPH?
No. Flow depends on conditions such as pressure and voltage. The listed 300 LPH EVIL ENERGY pump, for example, specifies 300 LPH at 43 PSI and 13.5V, with lower figures under other stated test conditions.
Is a higher-flow pump always better?
No. Choose a pump that meets the engine’s fuel demand at its operating pressure and suits the installation. A higher maximum-flow rating alone does not confirm the pump is the right match.
Can I install a universal external pump without modification?
Not necessarily. Universal fit does not guarantee direct fitment. The JDMSPEED listing specifically notes that adaptation may be required and that installation requires skill and knowledge.
What should I verify before buying?
Check the EFI voltage, required flow at operating pressure, fuel type, port and hose sizes, mounting needs, and any included regulator or fittings. Confirm the product’s stated application matches your vehicle or conversion.