5 Best Inline Fuel Pump: Options Compared

If you’re upgrading a fuel-injected race car or restoring a classic lawn mower, choosing the best inline fuel pump can feel overwhelming with so many flow ratings and connection types available. This guide breaks down five reliable options, from high-flow EFI pumps to low-pressure transfer units, so you can match performance to your specific application.

We’ll cover key differences in flow rates, fuel compatibility, and installation tips to help you make a confident choice.

EVIL ENERGY 300LPH External Pump – Bracket Included

The EVIL ENERGY B0D1KH5YJH stands out with its included 60mm bracket clamp, making mounting straightforward on custom EFI setups. Its test flow rates reach 300 LPH at 13.5V and 43 PSI, dropping to 255 LPH at 12V, so you get consistent high-volume fuel delivery for boosted applications. The unit handles gasoline, race gas, and diesel across a wide -68°F to 194°F range.

Installation instructions guide you to mount the pump below the tank for reliable gravity feed. It’s a solid choice if you already have your own -6AN lines and fittings, as none are provided here. The black finish and compact design fit neatly in tight engine bays.

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• Fitment: This external fuel pump is designed to fit 12V DC EFI systems only.
• Parameter: Test flow: 200 LPH (at 75 PSI & 12V); 255 LPH (at 43 PSI & 12V); 300 LPH (43 PSI & 13.5 V). Operating pressure: 75 PSI. Operating temperature range: -68℉ to 194℉.
• Medium: The inline fuel pump is compatible with gasoline, pump gas, race gas, and diesel.
• Installation: It is recommended to install the fuel pump below the tank to ensure gravity-fed fuel flow from the tank. Installation instructions are included.
• Package Contents: The package includes 1 × fuel pump, 1 × mounting bracket, 2 × gaskets, 1 × washer, 2 × nuts, 2 × insulated terminals, 1 × 10AN inlet adapter, 1 × 6AN outlet adapter, 2 × rubber connection covers, and a detailed user manual — ensuring a straightforward installation process.

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EVIL ENERGY Universal 300LPH – No Bracket

This EVIL ENERGY B07Y9WW183 delivers identical flow specs to its bracket-equipped sibling: 300 LPH at 13.5V, 255 LPH at 43 PSI, and 200 LPH at 75 PSI. It’s designed strictly for 12V DC EFI systems and works with gasoline, pump gas, race gas, or diesel. The operating temperature range is the same -68°F to 194°F, so it’s suitable for extreme climates.

The difference is no bracket clamp—you’ll need to source your own mounting solution. Installation still requires placing the pump below the fuel tank for gravity flow. This is the ideal choice if you’ve already got a bracket from your existing pump or prefer a minimalist universal unit.

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• Application: This fuel pump is designed to fit 12V DC EFI systems only.
• Parameter: Test flow: 200 LPH (at 75 PSI and 12V), 255 LPH (at 43 PSI and 12V), and 300 LPH (at 43 PSI and 13.5V). Operating pressure: 75 PSI. Operating temperature range: -68°F to 194°F.
• Medium: The inline fuel pump is compatible with gasoline, pump gas, race gas, and diesel.
• Installation: It is recommended to install the fuel pump below the tank to ensure gravity-fed fuel flow from the tank. Installation instructions are included.
• Package Contents: The package includes 1 × fuel pump, 2 × gaskets, 1 × washer, 2 × nuts, 2 × insulated terminals, 1 × inlet 10AN adapter, 1 × outlet 6AN adapter, 2 × rubber connection covers and 1 × user manual for easy installation.

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EVIL ENERGY 300LPH Kit – with Fuel Line & Fittings

The EVIL ENERGY B0FPWP8JXC kit bundles a 300 LPH external pump with 10 feet of 6AN CPE hose (rated 750 PSI) and precision aluminum fittings. This is a ready-to-install solution for EFI upgrades—just bolt it in and connect. The pump’s flow parameters mirror the others: 300 LPH at 13.5V, 255 LPH at 12V and 43 PSI, with 75 PSI max operating pressure.

The hose features a CPE rubber inner tube with 304 stainless wire reinforcement and a nylon outer braid for flexibility and strength. Being a kit, you avoid sourcing separate parts, though the CPE material is less durable than full stainless braid for extreme racing. It’s an excellent one-stop package.

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• Fuel System Upgrade: This kit includes a high-flow fuel pump (200–300 LPH), a 6AN CPE fuel line rated at 750 PSI, and precision aluminum fittings. It provides stable, high-volume fuel delivery for gasoline and diesel applications.
• Material: The 6AN fuel hose features a CPE rubber inner tube, 304 stainless-steel wire reinforcement, and a durable nylon outer braid for added strength and flexibility. Lightweight aluminum fittings resist corrosion and ensure long-lasting performance.
• Parameter: Test Flow: 200 LPH (75 PSI & 12V); 255 LPH (43 PSI & 12V); 300 LPH (43 PSI & 13.5V). Operating Pressure:75 PSI. Operating Temperature Range: -68°F-194°F.
• Compatibility: This high-flow 300 LPH external fuel pump with a 6AN fuel hose is compatible with gasoline and diesel, ensuring stable and reliable fuel delivery for 12V DC EFI systems.
• Installation Tips: Mount the inline fuel pump below the fuel tank for optimal gravity-fed operation. All necessary fittings and instructions are included for a secure and hassle-free installation.

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CarBole Universal 300LPH – 10AN Inlet

The CarBole B0D5429PS9 brings a 300 LPH external inline pump designed for 12V DC EFI systems with a 10AN inlet and 6AN outlet—larger inlet port than many competitors for reduced restriction. Its flow rates match the 200/255/300 LPH curve seen on other high-output units. It comes with a mounting bracket and clamp for straightforward installation.

Note that CarBole explicitly advises against using alcohol or E85 fuels, which can shorten pump life. It’s optimized for gasoline and diesel. Connection is simple: positive and negative power leads at the fuel outlet. If you need a budget-friendly high-flow pump with standard AN fittings and a bracket, this is a strong contender.

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• Fit for EFI System Only: DC 12V, Universal for Diesel & Gasoline, it is not recommended to applicable with alcohol /E85 fuels which may diminished working life of pump. Please use with a pre-filter
• External Inline Fuel Pump: Test Flow Rate: 200LPH at 75PSI; 255LPH at 43PSI; Max Flow Rate: 300LPH at 43PSI & 13.5V. 100% brand new and high quality. Universal external in line fuel pump. Does not need to be mounted inside fuel tank
• 10AN inlet and 6AN outlet connections for easily install on new applications and replace existing fuel pumps. Up to 300lph flow rate fuel pump delivers incredible performance and value, able to handle higher horsepower applications
• Please connect the positive and negative poles of the power cord at the fuel outlet according to the markings. Package including necessary installation kits: pump*1, mounting bracket*1, inlet adapter*1, outlet adapter*1, one-way check valve*1, gaskets*2, nuts*2, terminals*2, covers*2
• Recommended to install below the tank ensures that fuel is gravity-fed from the fuel tank. When mounted on the vehicle, it may helps to stable and safe start-up of the vehicle, meeting the requirements of most turbocharging applications.

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SOLLON Universal Low Pressure 2.5-4psi – Carburetor

The SOLLON B08PY7V2MM is a different beast—a low-pressure inline pump delivering just 2.5-4 PSI at 30 GPH, perfect for carbureted engines, lawn mowers, ATVs, marine engines, and generators. It runs on 12V DC and fits 5/16-inch hose (8mm). The built-in check valve prevents fuel backflow when the pump is off, a nice touch for consistent starts.

Its plunger-type design provides stable, quiet fuel supply, and the lightweight aluminum body with two-bolt mounting makes installation quick. This is not suitable for EFI systems needing high pressure, but for small engines or classic cars with carbs, it’s a dependable, affordable upgrade.

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• 【Specification】Inline Fuel Pump, Output Pressure : 2.5-4 psi, Voltage : 12 Volt, Flow Rate : 30 GPH, Hose Size : 8 mm ( 5/16 inch )
• 【Compatibilty with】Electric Fuel Pump 12v Universal, fits for Trucks, Carburetor, ATV, Marine, Motor, UTV, All 12 Volt Cars, Boats, Generators, Lawn Mower
• 【Performance】Low Pressure Fuel Pump, build-in check valve design to prevent back flow, light-weight and small size, plunger-type fuel supply, suction stronger, more stable oil supply, 12 Volt Fuel Pump, two-wire design, can be used as booster, standby unit or as a completely independent fuel pump installation and mounted anywhere
• 【Easy to install】Light weight, quite operation, easy to fit and connect: 2 bolt fixing, 2 wires design.
• 【Note】If you have any questions about our fuel pump, please contact us for a satisfactory solutions.All new products have undergone oil pump tests before leaving the factory. A small amount of oil stains inside are test marks, not usage marks. Please use them with confidence

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Buyer’s Guide: What to Consider

Match your engine’s fuel delivery needs with the right flow rate, pressure, and compatibility by considering these key factors before buying an inline pump.

• Flow Rate & Voltage: Ensure the pump's voltage (12V) and flow rate (LPH) match your EFI or carbureted system. Forced induction may require higher LPH.
• Medium Compatibility: Select a pump compatible with your fuel type—gasoline, diesel, or race gas. Avoid using alcohol/E85 blends if not specified by the manufacturer.
• Installation & Position: Mount the pump below the tank for gravity-fed flow. Use included brackets or clamps, and ensure hose/fitting sizes match your lines (e.g., -6AN).
• Pressure & Temperature Limits: Check operating pressure (e.g., 75 PSI max) and temperature range to ensure reliability under your engine's typical running conditions.
• Bare Pump vs. Complete Kit: Choose between bare pumps, or kits with pre-cut hose and fittings for easier installation. Kits save time and reduce potential leak points.

Conclusion

Getting the right inline fuel pump means matching your engine’s pressure and flow needs while ensuring fuel compatibility and proper installation. For EFI builds, the EVIL ENERGY pump alone or the kit offers proven performance; for carbureted gear, the SOLLON low-pressure unit does the job quietly.

Measure your system requirements carefully, and pick the option that fits your project best.