In-tank fuel pump

An in-tank fuel pump is an electric fuel pump designed to be installed directly inside the vehicle's fuel tank. This is the standard configuration for nearly all modern vehicles because it offers two core advantages: quiet operation (the fuel itself muffles the pump's sound) and longer lifespan (the pump is submerged in fuel, which constantly cools it and prevents overheating). For performance upgrades, a high-flow universal in-tank fuel pump is the ideal choice for replacing a weak factory pump to support higher horsepower.

Why Choose an In-tank Fuel Pump?

An in-tank fuel pump is the preferred solution for anyone seeking OEM-level reliability and comfort.

  • Ultra-Quiet Operation: The surrounding fuel acts as a natural sound barrier, making the pump's operation virtually silent for a more comfortable driving experience.
  • Superior Cooling: Because the pump is submerged, the fuel constantly draws heat away from the motor. This keeps the pump at its optimal operating temperature, which is critical for the durability of a high-performance pump.
  • Prevents Cavitation: An in-tank pump 'pushes' fuel out from the bottom of the tank, rather than "pulling" it like an external pump. This design is far less prone to fuel cavitation or starvation.

Universal In-tank Fuel Pump: The Seamless Performance Upgrade

When your factory pump can no longer supply the flow needed for your modified engine (e.g., turbo, supercharger, or V8 swap), a high-flow universal in-tank fuel pump (like a 255LPH or 340LPH model) is the best upgrade path. These are often designed to replace a wide variety of factory pumps, allowing you to gain the fuel flow needed for big power while retaining the quiet, factory-style integration of your fuel system.

EVIL ENERGY Fuel Pump: The Powerful Heart Inside Your Tank

The EVIL ENERGY fuel pump collection includes a range of high-performance in-tank pumps built to meet the rigorous demands of enthusiasts. Every EVIL ENERGY fuel pump is strictly tested for flow rate and pressure to ensure it delivers a steady, reliable fuel supply when you demand maximum power. Choosing EVIL ENERGY means choosing a strong, trustworthy heart for your build.

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[CPE][PTFE]
EVIL ENERGY Fuel Cell Tank Kit-Efficient Fuel System Solutions 5/10/15 Gallon

This comprehensive kit includes: 

  • 5/10/15 Gallon Fuel Cell Tank
  • 20-75PSI&75-120PSI fuel pressure regulator
  • 300LPH high flow fuel pump
  • 6AN 20FT CPE/PTFE Durable fuel lines (optional fittings)
  • 10&100-micron fuel filter
  • 50mm Fuel Filter Mounting Bracket*2
  • 60mm Fuel Filter Mounting Bracket*1
  • necessary fittings for easy installation. 
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[30-70PSI][30-70PSI,Black]
EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable 20-140psi Black&Red - Red

Durable Construction: Precision-machined 6061-T6 aluminum alloy, corrosion-resistant and heat-tolerant (withstands harsh engine bay conditions), ensuring long-term reliability.

EFI System Compatibility: Fits most vehicles' electronic fuel injection (EFI) systems; maintains stable fuel pressure for optimized combustion, performance, and fuel economy.

Fuel Compatibility: Works with gasoline, E85, and alcohol/ethanol; not compatible with diesel fuel; note: nylon braided fuel lines are not E85-compatible (use PTFE-lined hoses for E85).

Bypass Return Design: Prevents pressure spikes during acceleration, boost, or high-load scenarios, protecting fuel injectors and rails from damage.

All-in-One Kit: Each variant includes essential components (fuel pressure regulator, pressure gauge, fittings, sealant tape, tools like Allen keys); no extra purchases needed for standard installation.

Easy Installation & Tuning: Adjust pressure via top set screw (clockwise = increase, counterclockwise = decrease); use thread sealant tape on NPT gauge port to avoid leaks; professional installation highly recommended (especially for high-pressure variants).

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[20FT] EVIL ENERGY PTFE Fuel Line Kit, complete black hose & fittings set, 180-day return[16FT] EVIL ENERGY PTFE Fuel Line Kit, black braided hose, fittings, free shipping & return
EVIL ENERGY 4/6/8/10AN PTFE Fuel Line Kit | E85 Nylon Braided Hose | 16/20FT Black Black with Comprehensive Fittings

Three-Layer Construction: Our fuel lines are constructed with a triple-layer material for unparalleled performance and protection. The innermost layer is made of PTFE for maximum chemical resistance, a braided stainless steel layer for strength and durability, and an outer nylon layer for added abrasion resistance and protection.

Multiple Sizes: We offer our fuel lines in 4AN, 6AN, 8AN, and 10AN sizes, catering to the diverse needs of various fuel delivery systems.

Fitting Types: Our kit includes a variety of fittings at 0°, 90°, 45°, and 180° angles, ensuring versatility and flexibility during installation, allowing for custom routing in tight or complex spaces.

Precision Fit and Leak-Free Performance: The combination of the PTFE inner layer and the high-quality aluminum hose ends ensures a precision fit and leak-free connection, even under extreme pressure, providing a safe and reliable fuel system.

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  • EVIL ENERGY EFI Fuel Pump With Fuel Filter Kit External or IntankEVIL ENERGY EFI Fuel Pump With Fuel Filter Kit External or Intank
    EVIL ENERGY EFI Fuel Pump With Fuel Filter Kit External or Intank

    [Bundle with]
    Fuel Pump(Optional):
    - 300LPH External Fuel Pump Fitting Kit
    - 255LPH Intank
    - 110LPH Intank
    Fuel Filter (Optional): 10 Micron/30 Micron/40 Micron/100 Micron
    Bracket: 50MM/60MM

    Note：Please pay attention to the dimensions and choose the product that best fits your needs.

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  • EVIL ENERGY EFI 255LPH Electric Intank Fuel Pump High Flow 43PSI KitEvilenergy EVIL ENERGY EFI 255LPH Electric Intank Fuel Pump High Flow 43PSI Kit
    EVIL ENERGY EFI 255LPH Electric Intank Fuel Pump High Flow 43PSI Kit
    • EVIL ENERGY intank fuel pump fit for 12V DC EFI system only.
    • Test flow：255LPH (43PSI), 190LPH (80PSI), Operating Pressure: 15-90 PSI, final fuel pressure set by regulator.
    • Applicable fuel: gasoline, E85 and ethanol gasoline with less ethanol content than E85. (high impurity gasoline will directly affect the pump life)
    • Note: The diameter of 255LPH high-flow intank electric fuel pump may be different from the original model, but it will not affect the use. Hoses, filters or other equipment may need to be replaced. Professional installation is highly recommended.
    $30.99
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  • Evilenergy EVIL ENERGY Intank Electric Fuel Pump Kit E2068 E8229 Compatible with Toyota Honda Mazda LexusEvilenergy EVIL ENERGY Intank Electric Fuel Pump Kit E2068 E8229 Compatible with Toyota Honda Mazda Lexus
    EVIL ENERGY Intank Electric Fuel Pump Kit E2068 E8229 Compatible with Toyota Honda Mazda Lexus
    Product details Brand EVIL ENERGY Fit Type Vehicle Specific Fit Vehicle Service Type 1997-2014,Honda Civic Material Metal Item Weight 380 Grams   About this item [Replace OE Part Number]E8335, E8212, E8229, E8254, E8213, E2068. [Fitment] The Electric fuel pump compatible with 1992-2014 Honda Civic,1997-2014...
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    $39.19
  • Evilenergy EVIL ENERGY Intank Electric Fuel Pump Kit E2157 Compatible with Ford Explorer Escape Lincoln ContinentalEvilenergy EVIL ENERGY Intank Electric Fuel Pump Kit E2157 Compatible with Ford Explorer Escape Lincoln Continental
    EVIL ENERGY Intank Electric Fuel Pump Kit E2157 Compatible with Ford Explorer Escape Lincoln Continental
    Product details Brand EVIL ENERGY Fit Type Vehicle Specific Fit Specification Met OE Lift Type Electric [Replace OE Part Number]E2157. [Fitment] The Electric fuel pump compatible with 1995-2010 Ford Explorer,2001-2004 Ford Escape L4 2.0L,2005-2008 Ford Escape L4 2.3L,2001-2008 Ford Escape V6 3.0L,1998-2003 Ford Escort...
    $18.19
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  • [30-70PSI,255LPH Intank][30-70PSI,300LPH External]
    EVIL ENERGY Fuel System Bundle: Universal Fuel Filter, Fuel Pump & Pressure Regulator

    Note: The color of the filter fittings and filter heads will be shipped randomly.(silver or black)

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FAQs about In-tank fuel pump

What is an in-tank fuel pump?

An in-tank fuel pump is an electric fuel pump that is designed to be installed inside the fuel tank, submerged in fuel. This is the standard design for almost all modern production vehicles.

The in-tank design has two major advantages:
1. Cooling: The fuel surrounding the pump constantly cools it, preventing overheating and significantly extending its service life.

2. Quiet Operation: The fuel in the tank acts as a natural sound insulator, making in-tank pumps much quieter than external (inline) pumps.

You should upgrade your stock in-tank fuel pump when it can no longer supply the volume of fuel your engine needs. This almost always happens when you add performance modifications like a turbocharger, supercharger, larger injectors, or swap in a more powerful engine. A high-flow pump (e.g., 255LPH, 340LPH) is required to prevent fuel starvation at high horsepower.

The main challenge of installing an in-tank fuel pump is that you must first access the fuel tank. This typically involves removing the back seat or, more commonly, dropping the entire fuel tank from underneath the car. While the pump swap itself is often straightforward, accessing it is the most difficult part of the job.

An EVIL ENERGY fuel pump is a high-performance, reliable upgrade over your factory pump. Our in-tank fuel pump models are designed to provide significantly higher fuel flow (LPH) to support your modified engine's power goals. They are built for durability and are a cost-effective solution for ensuring your engine gets the stable fuel supply it needs.

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