5 Best External Fuel Pump for LS Swap

Upgrading your LS swap with a reliable external fuel pump is crucial for consistent performance and engine safety. Whether you’re building a high-horsepower street machine or a track-focused racer, choosing the right pump and regulator setup can make or break your project.

This guide reviews five top-rated external fuel pump options designed specifically for LS swap EFI conversions. Each product is evaluated on flow rate, pressure regulation, and ease of installation to help you make an informed decision.

EVIL ENERGY 58 PSI Fuel Filter Regulator with External High Flow 300LPH Electric Inline Fuel Pump

The EVIL ENERGY kit combines a precise 58 PSI fuel filter regulator with a high-flow 300 LPH inline pump, making it a complete solution for LS swap EFI conversions. The integrated 10-micron filter element ensures clean fuel delivery, protecting your injectors and engine from contaminants. This setup is specifically designed for 1999-2014 Chevy V8 engines like the 4.8L, 5.3L, and 6.0L LS-series, so you know it’s built for your swap.

Installation flexibility is a standout feature, as the regulator is ideal for engine bay mounting, keeping the system tidy and accessible. The pump delivers a maximum flow of 300 LPH at 13.5V, supporting high-horsepower applications without breaking a sweat. If you want a reliable, all-in-one fuel delivery system that simplifies your LS swap, this kit delivers consistent pressure and clean fuel from the start.

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• Precise Fuel Control for LS Engine Performance​: EVIL ENERGY LS swap regulator maintains optimal fuel pressure at 58 PSI. The integrated 10-micron filter element ensures clean fuel reaches your engine, protecting it and enhancing performance and longevity.
• High-Flow 300LPH Inline Electric Fuel Pump​: EVIL ENERGY external pump delivers a maximum flow of 300 LPH (at 13.5V) to support high-horsepower applications. It operates reliably under pressure (up to 75 PSI) and across a wide temperature range (-68°F to 194°F).
• Wide Compatibility for Easy EFI Upgrades​: Designed for 1999-2014 Chevy V8 engines (4.8L, 5.3L, 6.0L LS-series). The fuel pump is for 12V DC electronic fuel injection (EFI) systems, and the regulator and pump are compatible with gasoline and diesel fuels.
• Installation Flexibility & Complete Kit​: The regulator is ideal for engine bay mounting to stabilize pressure. The pump is designed for below-tank mounting to use gravity-fed fuel supply. Includes all necessary fittings, adapters, and a mounting bracket for a streamlined installation.
• Package Includes Everything You Need: 1x 58 PSI Fuel Filter Regulator, 1x 300LPH External Fuel Pump, 1x Fuel Pump Bracket, 1x M12x1.5 to AN6 Adapter, 1x AN10 to M18x1.5 Adapter, 1x AN6 to 5/16" Quick Disconnect, 2x AN6 to 3/8" Quick Disconnects, 1x AN6 to 3/8" EFI Quick Disconnect Fitting.

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Gautory 300LPH High Flow External Inline Fuel Pump (044 Style) – Anodized Red

The Gautory 300LPH pump delivers up to 300 LPH at 13.5V and maintains a steady 200 LPH flow even under 75 PSI, making it ideal for turbo or supercharged LS swaps. Its anodized red coating provides superior corrosion resistance and a custom racing look that stands out in any engine bay. This 044-style pump is a perfect replacement for Bosch 0580254044 units and includes 6AN and 10AN fittings for easy integration.

Designed for high-horsepower EFI engines up to 700HP, this pump is ready for racing, drift, and performance upgrades. The high-pressure performance ensures consistent fuel delivery under extreme conditions, so you can push your LS swap to the limit. If you need a durable, high-flow pump that handles boost and high RPMs, the Gautory 044-style pump is a solid choice.

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• 1. [High Flow Rate] Delivers up to 300 LPH at 13.5V and 255 LPH at 12V (43 PSI). Supports high-horsepower EFI engines up to 700HP. Ideal for racing, drift, and performance upgrades.
• 2. [75 PSI High-Pressure Performance] Maintains a steady 200 LPH flow even under 75 PSI (5.0 bar) extreme pressure. Specifically designed for Turbo/Supercharged systems where consistent fuel pressure is critical.
• 3. [Anodized Anti-Corrosion Finish] Professional Anodized Red/Blue coating provides superior corrosion resistance and a custom racing look. Built to last in harsh engine bay environments.
• 4. [044 Style & LS Swap Ready] Perfect replacement for 0580254044 pumps. Includes 6AN & 10AN fittings for a leak-free setup. Fully compatible with LS Swaps, EFI systems.
• 5. [Wide Operating Range] Reliable performance from -68°F to 194°F. Recommended for inline installation below the tank level to ensure gravity priming, prevent backflow, and extend pump life.

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Yinlowa GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator

The Yinlowa GSL392 kit pairs a high-pressure inline fuel pump with a 58 PSI fuel filter regulator, delivering a complete EFI conversion solution for LS swaps. The regulator comes with 6AN adapter fittings and delivers 58 PSI (4 BAR) to your fuel rail, ensuring proper pressure for LS injectors. The GSL392 pump is designed for high-pressure racing or performance vehicles, providing stable and safe fuel delivery under demanding conditions.

This setup fits EFI applications including turbo and supercharged systems, with a variety of pressures and flows available. The regulator replaces part numbers like 61633737 and 001834890, making it a direct upgrade for many LS swap projects. If you want a matched pump and regulator combo that simplifies installation and delivers consistent pressure, the Yinlowa kit offers reliable performance for your build.

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• REPLACEMENT 58 PSI FUEL FILTER REGULATOR – Fuel pressure regulator filter kit comes with 6AN adpater fittings for LS Swap , which can deliver 58 PSI (4 BAR) to your fuel rail and return unused gas to the tank. Besides, it can ensure the clean fuel is delivered properly to your engine with a 10 micron fuel filter, which play an important role in protecting the daily operation of the engine, and extending the engine service lifespan.
• GSL392 HIGH PRESSURE FUEL PUMP – LS Inline fuel pump is designed to start higher-pressure fuel racing or performance-purpose vehicles stably and safely, which can help to meet the requirements of most modern turbocharging applications. At 80 PSI, Yinlowa 255 lph high pressure fuel pump can flow around 132 liters (35 gallons) per hour; At that same 80 PSI the equivalent HP (high pressure) fuel pump can flow over 210 liters (50 gallons) per hour; Pressure: 255 (LPH) Liters Per Hour; AMP: 20.
• FITMENTS – GSL392-400-939 Inline Fuel Pump fits EFI applications including turbo and supercharged, variety of pressures and flows available, including high pressure performance; 58 PSI Fuel Pressure Regulator AN-6 Fittings for LS Swap EFI Conversion is compatible with Chevy 1999-2014 V8 5.3L/325 Chevy small block Gen III/IV (LS-based engines); Chevy 1999-2014 V8 4.8L/294 Chevy small block Gen III/IV (LS-based engines); Chevy 1999-2014 V8 6.0L/364 Chevy small block Gen III/IV (LS-based engines).
• REPLACE PART # – Fuel Filter Regulator Replaces 61633737, 001834890, 1834890 86737, FF881DL, G11290, G8836, GF1822, GG299, GG-299, GF336, G3737, 33737, 3737, 73737, PF5493, F55493, WIX 33737, 10299146, 19239926, GF822, TBSS intake, NNBS Intake, L92 Intake, returnless, LS1, LS2, LS3, LS6, LQ4, LQ9, LM7, L99, L76, LSX, 4.8, 5.3; Adapter Fitting Replaces 644123, 644113; Fuel Pump Replaces GSL392-400-939 ; GSL392400939; GSL392; 400-939. Please check fitments & part number before ordering, Thanks!
• OEM DESIGN, DIRECT FIT – With mounting bracket and rubber insulator, fuel pressure regulator filter kit can be installed easily in the place between the tank and the engine or in the engine compartment. After simple installation, this filter help to create a returnless fuel supply for LS engine swaps and electronic fuel injection conversions. The bypass regulator passes excess fuel back into the tank then the pump can run freely. Save time and hundreds of dollars by replace the parts yourself.
• WHAT YOU’LL GET – 1 x fuel filter/regulator, 1 x 3/8'' EFI push on lock fitting for inlet, 1 x 5/16'' EFI push on lock fitting for return, 1 x 6AN male to 3/8 male push on EFI fitting for outlet, 1 x GSL392 Inline fuel pump; 12-MONTH Warranty and LIFETIME Technical Support; If this GSL392-400-939 Fuel Pump Kit ever fails on your EFI applications, please don’t hesitate to contact us for the replacement. True hassle-free shopping experience 🙂

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EVIL ENERGY LS Swap Fuel Filter Regulator 58PSI with PTFE Hose Kit & 300LPH Pump

This EVIL ENERGY kit includes a 58 PSI fuel filter regulator, a 300 LPH external inline fuel pump, and a 25-foot PTFE fuel line with 6AN fittings, providing everything you need for a clean LS swap installation. The regulator features a built-in 10-micron filter to keep fuel clean, while the pump delivers up to 300 LPH at 43 PSI (13.5V). Designed for 1999-2014 Chevy V8 LS engines, this kit ensures compatibility with your swap.

The PTFE fuel line is durable and flexible, resisting heat and chemical degradation for long-lasting performance. The pump is compatible with gasoline, pump gas, race gas, and diesel, giving you flexibility in fuel choice. If you want a complete fuel system kit that includes high-quality lines and fittings, this EVIL ENERGY package simplifies the build process and ensures reliable fuel delivery.

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• Perfect for LS Swap: Designed for 1999-2014 Chevrolet V8 4.8L/5.3L/6.0L LS-based engines. The EVIL ENERGY LS Swap Fuel Filter Regulator Kit includes a 58PSI regulator and a 6AN PTFE nylon braided fuel line kit, ideal for EFI LS system and EFI conversion projects.
• High-Flow Fuel Pump: EVIL ENERGY External Inline Fuel Pump delivers up to 300LPH at 43PSI (13.5V), ensuring consistent fuel flow. Compatible with gasoline, pump gas, race gas, diesel, E85, and alcohol/ethanol. Operating pressure: 75PSI.
• Built-In 10 Micron Filter: The LS swap fuel regulator features a built-in 10-micron filter to ensure clean, reliable fuel delivery to your engine, helping protect vital components from contaminants.
• Durable and Flexible Fuel Line Kit: Includes a 25FT PTFE fuel line (5/16" ID, 0.465" OD), capable of withstanding extreme temperatures from -76℉ to 446℉ and pressure up to 3000 psi (bursting pressure: 10000psi), ensuring long-lasting and safe operation.
• Complete Kit for Easy Installation: The kit includes 6AN adapter fittings and everything needed for installation, providing a straightforward and professional solution for your LS engine swap or EFI conversion project.

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

The standalone EVIL ENERGY 300LPH external inline fuel pump is a universal high-flow option for 12V DC EFI systems, making it a versatile choice for LS swaps. It delivers 200 LPH at 75 PSI and 12V, 255 LPH at 43 PSI and 12V, and 300 LPH at 43 PSI and 13.5V, with an operating pressure of 75 PSI. This pump is compatible with gasoline, pump gas, race gas, and diesel, so you can use it with various fuels.

Installation is straightforward, but it’s recommended to mount the pump below the tank to ensure gravity-fed fuel flow. The pump operates in temperatures from -68°F to 250°F, making it suitable for harsh environments. If you need a reliable, high-flow pump without a regulator or filter, this EVIL ENERGY unit is a great building block for a custom fuel system on your LS swap.

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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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Buyer’s Guide: What to Consider

Choosing the right external fuel pump for your LS swap involves balancing flow rate, pressure, and compatibility. Here are five key factors to consider.

• Flow Rate: Look for pumps delivering at least 255-300 LPH to support high-horsepower LS engines. Higher flow ensures consistent fuel delivery under load.
• Pressure Regulation: LS swaps typically require 58 PSI (4 BAR). Choose a pump with a built-in regulator or pair it with a separate unit for precise control.
• Fuel Compatibility: Ensure the pump handles your fuel type—gasoline, race gas, or diesel. Some pumps are multi-fuel compatible, offering more flexibility.
• Installation Ease: Kits with pre-assembled fittings, brackets, and fuel lines simplify installation. Consider mounting location and whether the pump needs to be below the tank.
• Durability: Look for corrosion-resistant coatings and robust construction. Anodized finishes and PTFE lines resist heat and chemicals for long-term reliability.

Conclusion

Selecting the best external fuel pump for your LS swap depends on your specific build needs. For a complete all-in-one solution, the EVIL ENERGY kit with regulator and filter is hard to beat. If you’re building a turbocharged monster, the Gautory 044-style pump handles high pressure with ease.

For a straightforward installation with included fuel line, the EVIL ENERGY PTFE kit is a great choice. Whichever you choose, ensure it matches your horsepower goals and fuel type for reliable performance.