Fuel Pump for LS Swap Reviews: 5 Best Options

Upgrading to an LS engine in your classic truck or project car is an exciting step, but getting the fuel system right is critical. Without a proper pump and regulator, your new V8 won’t run reliably or make the power you expect.

This guide reviews five of the best fuel pump options for LS swaps, from complete regulator kits to drop-in hanger assemblies. You’ll find the right solution for your build, whether you need a high-flow inline pump or a direct-fit unit for a Square Body Chevy.

EVIL ENERGY 58 PSI Fuel Filter Regulator with 300LPH Pump

The EVIL ENERGY kit gives you precise fuel control for your LS swap by maintaining a steady 58 PSI at the fuel rail. Its integrated 10-micron filter element keeps contaminants out of your injectors, which is essential for long-term reliability. The high-flow 300LPH inline electric pump supports high-horsepower builds, delivering consistent flow even under load. You get a complete solution that simplifies your EFI conversion without piecing together separate components.

This kit is designed for 1999-2014 Chevy V8 engines, including 4.8L, 5.3L, and 6.0L LS-series motors. The regulator is ideal for engine bay mounting, giving you installation flexibility. With all necessary fittings included, you can set up a clean, professional fuel system that meets the demands of your swap.

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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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Lanotech 340LPH Fuel Pump Hanger for 73-91 Square Body

The Lanotech fuel pump hanger is built specifically for 1973-1991 Square Body trucks, including C10, K10, and C20 models, making your LS or LT swap much simpler. It eliminates failure-prone splices and solder joints inside the fuel tank, giving you a safer, more reliable connection. The hanger is rated at 58 PSI and comes with a 14-gauge 255LPH pigtail and a plug-and-play adapter harness for EP381 style pumps. You can install it without using compression fittings, which reduces leak points.

This 340LPH pump ensures you have enough flow for moderate to high-horsepower LS builds. The included sending unit works with your factory gauge, so you don’t lose functionality. It’s a direct-fit solution that saves you fabrication time and delivers dependable fuel pressure for your EFI conversion.

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• Compatible with EFI LS or LT (L83/L86/LT1) swapped Square Body trucks 1973-1991, including C10, K10, R10, C20, K20, R20, C30, K30, R30, V10, V20, V30 – rated at 58psi.
• Eliminate failure prone splices and solder joints inside the fuel tank
• Safely LS/LT swap your Square Body pickup without using compression fittings
• Wiring: 14 gauge 255LPH pigtail included. Plug and play adapter harness included for use with EP381 style fuel pumps
• 【340LPH High Flow + Fuel Sending Unit】 Complete assembly with integrated fuel level sending unit and -6AN fitting hanger. Plug-and-play design for 1973-1991 Square Body trucks—no modifications needed.

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OSIAS Squarebody 73-91 LS/LT Swap 450LPH Hanger

The OSIAS hanger is designed for EFI LS or LT swapped Square Body trucks from 1973 to 1991, offering a high-flow 450LPH pump for demanding builds. It includes a 14-gauge 255LPH pigtail and a plug-and-play adapter harness for EP381 pumps, making wiring straightforward. The updated bulkhead connector handles up to 20 amps, ensuring reliable power delivery. A corrosion-resistant coating protects the assembly from fuel and moisture, extending its life in harsh environments.

Note that this bulkhead is not designed for TI Automotive pumps that draw excessive current, so check your pump compatibility. The hanger includes a sending unit, so you retain fuel level functionality. For high-horsepower LS or LT swaps, this 450LPH pump provides the volume you need without sacrificing reliability.

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• Applications: Can be used on EFI LS or LT swapped Square Body applications
• Wiring: 14 gauge 255LPH pigtail included. Plug and play adapter harness included for use with EP381 pump.
• Updated bulkhead connector can handle up to 20amps (NOTE: This bulkhead is not designed for TI Automotive F90000267, F90000274, F90000285, or F90000295 fuel pumps which draw in excess of 20amps). If using those pumps, you will need our "race" hanger which features a different bulkhead connector.
• Coating: Corrosion resistant
• Safely LS/LT swap your Square Body pickup without using compression fittings

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Dasbecan GSL392 255LPH Inline Pump & 58 PSI Regulator Kit

The Dasbecan kit combines a GSL392 255LPH inline fuel pump with a 58 PSI fuel filter regulator, giving you a complete solution for LS returnless EFI conversions. It replaces part numbers GSL392-400-939 and 61633737, ensuring compatibility with your system. The kit includes all necessary 6AN fittings and mounting hardware, so you can install it without sourcing extra parts. It’s built with high-quality materials that meet or exceed OEM standards, with a rugged metal housing to withstand high flow and pressure.

This setup fits 1999-2014 Chevy V8 engines, including 4.8L, 5.3L, and 6.0L LS-based motors. The 255LPH pump is sufficient for mild to moderate performance builds, while the regulator maintains precise fuel pressure. You get a reliable, straightforward upgrade for your LS swap that won’t break the bank.

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• Replaces Part Number: Fuel Pump Replaces GSL392-400-939, 400-939, GF822,19239926; Fuel Filter Regulator Replaces 61633737.
• Fitment: This fuel pump and filter regulator kit fits for LS Returnless 6AN Engine Swap with GSL392-400-939 Inline Fuel Pump, including all the necessary fittings and mounting hardware, Pressure: 255 Liters Per Hour (LPH), Fuel pressure: 58 PSI, AMP: 20, Fits most EFI applications including turbo and supercharged.
• Compatible with: 1999-2014 Chevy V8 5.3L/325 small block Gen III IV, LS based engines; 1999-2014 Chevy V8 4.8L/294 small block Gen III IV, LS based engines; 1999-2014 Chevy V8 6.0L/364 small block Gen III IV, LS-based engines
• Feature: Manufactured using high-quality materials, meet or exceed OEM standards, rugged metal housing including inlet and outlet to withstand high flow pressure, ensuring optima high-pressure performance.
• Package Includes: 1x GSL392 Inline Fuel Pump, 1x Fuel Filter Regulator, 1x 6AN to 3/8" Push-In for EFI Fitting, 2x Black LS1/LT1 -6AN to 3/8" Fitting, 1x Black LS1/LT1 -6AN to 5/16" Fitting, 1x Installation Kit.

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Yinlowa GSL392 Inline Fuel Pump & 58 PSI Regulator Kit

The Yinlowa kit delivers a 58 PSI fuel filter regulator and a GSL392 high-pressure inline fuel pump, designed for LS swap EFI conversions. The regulator comes with 6AN adapter fittings to connect to your fuel rail, ensuring a secure, leak-free setup. The pump is built for high-pressure applications, including turbo and supercharged builds, providing stable flow under demanding conditions. It replaces part numbers 61633737 and others, making it a direct swap for many systems.

This kit fits EFI applications with a variety of pressure and flow requirements, supporting 5.3L, 4.8L, and 6.0L LS engines. The pump’s rugged construction handles the demands of performance driving, while the regulator keeps pressure consistent. You get a versatile solution that works for naturally aspirated or forced induction LS swaps.

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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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Buyer’s Guide: What to Consider

Choosing the right fuel pump for your LS swap involves a few key factors. Use this guide to match the pump to your build’s needs.

• Flow Rate: Match the pump's LPH rating to your engine's horsepower. 255LPH works for mild builds, while 340-450LPH supports high-horsepower or forced induction.
• Fuel Pressure: LS EFI systems require 58 PSI. Ensure your pump and regulator are rated for this pressure to avoid drivability issues.
• Mounting Type: Inline pumps mount outside the tank, while hanger assemblies drop inside. Choose based on your chassis and fabrication skills.
• Compatibility: Verify the kit fits your specific vehicle year and engine. Square Body trucks need dedicated hangers, while universal kits work for custom swaps.
• Filter Integration: A built-in filter regulator simplifies installation and protects injectors. Separate components offer more flexibility but require extra plumbing.

Conclusion

Selecting the best fuel pump for your LS swap comes down to your vehicle, power goals, and budget. For a complete, high-flow kit, the EVIL ENERGY option stands out. If you’re working on a Square Body truck, the Lanotech or OSIAS hangers offer direct-fit convenience.

For budget-conscious builds, the Dasbecan kit provides reliable performance, while the Yinlowa pump handles boosted applications well. Consider your specific needs and choose the pump that fits your project best.