Best Inline Fuel Pumps for LS Swap Projects

Alright, if you’re like me, you’ve probably caught the LS swap bug. There’s nothing quite like dropping a powerful, modern LS engine into a classic car or even a different modern chassis. But as any seasoned gearhead knows, a successful engine swap isn’t just about the engine itself; it’s about all the supporting systems. And when it comes to keeping that beast fed, your fuel system is absolutely critical. We’re talking about reliable, consistent fuel delivery, especially the heart of it all: the inline fuel pump and its trusty companion, the fuel pressure regulator. I’ve spent my fair share of time wrestling with fuel lines and electrical wiring, and I know how frustrating it can be to get it wrong. That’s why I’ve put together this comprehensive guide, delving into some of the best inline fuel pumps for LS swap projects currently on the market. We’ll look at complete kits and pump-only options, compare their features, and give you the lowdown on what real users are saying, so you can make an informed decision for your build. Let’s dive in!

IMAGE	PRODUCT NAME	AMAZON LINK
	GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator…	View on Amazon
	Dasbecan GSL392 255LPH Inline Fuel Pump & 58PSI Fuel…	View on Amazon
	ZHSYMX GSL392 255LPH Inline Fuel Pump & 58 PSI LS…	View on Amazon
	Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel…	View on Amazon
	A-Premium Universal External Pump 255LPH High Pressure…	View on Amazon
	1PZ GSL392 Inline Fuel Pump & 58 PSI Fuel Filter…	View on Amazon
	JDMON Replacement For GSL392 Inline Fuel Pump & Fuel…	View on Amazon

1. GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator…

When you’re tackling an LS swap, getting the fuel pressure right is non-negotiable, and this kit from GSL392 aims to simplify that. What I really appreciate about this setup is that it pairs a reliable 255 LPH high-pressure fuel pump with a 58 PSI fuel filter regulator, which is exactly what most stock LS engines need. It’s designed to create a returnless fuel system, making your plumbing much cleaner and simpler, especially for those EFI conversions. The included AN-6 adapter fittings are a huge plus, as it means less time hunting for the right pieces and more time getting your project moving. This isn’t just about providing fuel; it’s about providing clean fuel, thanks to its 10-micron filter, which is crucial for protecting your injectors and extending engine life.

• Key Features:

  • Integrated 58 PSI (4 BAR) fuel filter regulator with 10-micron filtration.
  • GSL392 255 LPH high-pressure inline fuel pump capable of supporting performance applications.
  • Includes 6AN adapter fittings for easy LS swap conversion.
  • Designed for returnless EFI applications, simplifying the fuel system.
  • Comes with mounting bracket and rubber insulator for straightforward installation.

• Pros:

  • Complete kit with pump, regulator, filter, and fittings for a hassle-free setup.
  • Ensures correct 58 PSI fuel pressure for most LS engines.
  • High flow rate (255 LPH) suitable for stock to moderately modified LS engines.
  • Integrated filter provides crucial fuel system protection.
  • Includes a 12-month warranty and lifetime technical support.

• Cons:

  • Some users might prefer a different brand pump, as the GSL392 is a common design, but quality can vary between manufacturers.
  • Wiring for the pump is sold separately.

• Best for: Builders looking for a comprehensive, all-in-one solution for a returnless LS swap fuel system, prioritizing correct pressure and filtration with minimal fuss.

User feedback summary: Many users praised this kit for its completeness and ease of installation, noting that it provided the exact pressure needed for their LS builds. The included fittings were a particular highlight, saving time and money. Some mentioned that while the pump worked great, the mounting setup could be a bit basic, and they sometimes added extra sound dampening.

2. Dasbecan GSL392 255LPH Inline Fuel Pump & 58PSI Fuel…

Dasbecan offers another strong contender in the inline fuel pump category, specifically tailored for LS swaps requiring a returnless fuel system. This kit closely mirrors the GSL392 design, featuring a 255 LPH high-pressure inline fuel pump paired with a 58 PSI fuel filter regulator. What sets this kit apart is its emphasis on build quality, claiming to use high-quality materials and meeting or exceeding OEM standards for ruggedness and high-pressure performance. It’s a true plug-and-play solution in many ways, bundling all the necessary fittings and mounting hardware. This means you’re not just getting the core components but also the bits and pieces that often get overlooked, saving you another trip to the parts store.

• Key Features:

  • GSL392 255 LPH inline fuel pump and 58 PSI fuel filter regulator.
  • Comprehensive fitting package including 6AN to 3/8″ and 5/16″ push-in EFI fittings.
  • Rugged metal housing designed to withstand high flow pressure.
  • Meets or exceeds OEM standards for quality and durability.
  • Compatible with 1999-2014 Chevy V8 LS-based engines (4.8L, 5.3L, 6.0L).

• Pros:

  • Excellent value with a complete package of pump, regulator, and various fittings.
  • Focus on high-quality materials and OEM standards suggests good reliability.
  • Provides the essential 58 PSI for many LS engine applications.
  • Suitable for EFI applications, including turbo and supercharged setups.
  • Simplifies the ordering process by including most required accessories.

• Cons:

  • Specific brand of pump (GSL392 clone) might raise questions about longevity for some, though user reviews are generally positive.
  • Installation instructions might be minimal, requiring some prior knowledge.

• Best for: LS swap enthusiasts looking for a robust, complete kit with a strong emphasis on meeting OEM-level quality, without breaking the bank.

User feedback summary: Users were generally impressed with the kit’s completeness, mentioning that it included almost everything they needed for a smooth LS swap. The build quality felt solid, and the pump delivered consistent pressure. A few noted that the included fittings worked perfectly for their setups, making the installation less of a headache.

3. ZHSYMX GSL392 255LPH Inline Fuel Pump & 58 PSI LS…

The ZHSYMX offering focuses on delivering the core components you need for your LS swap fuel system. This kit includes the popular GSL392 255LPH high-pressure inline fuel pump and the essential 58 PSI EFI fuel pressure regulator. It’s designed to be a straightforward solution for those who appreciate getting the main pieces together in one go. While the description highlights its compatibility with a wide range of LS-based engines, the key benefit here is the promise of dedicated high-quality service and support, which can be invaluable when you’re in the middle of a complex build. This focus on customer experience suggests a brand that stands behind its product, offering peace of mind alongside the hardware.

• Key Features:

  • Universal GSL392 255LPH high-pressure inline fuel pump.
  • 58 PSI LS EFI Fuel Pressure Regulator Kit.
  • Compatible with Chevy 1999-2014 V8 4.8L, 5.3L, 6.0L LS-based engines.
  • Suitable for most EFI applications, including turbo and supercharged.
  • Strong emphasis on high-quality customer service and support.

• Pros:

  • Provides the essential components for a returnless LS swap fuel system.
  • The 255 LPH flow rate is adequate for many LS setups.
  • Direct compatibility with common LS engine generations.
  • The brand’s commitment to customer service adds significant value.
  • A cost-effective option for the main pump and regulator combo.

• Cons:

  • May require purchasing additional fittings or mounting hardware depending on your specific setup, as a full “installation kit” might be less comprehensive than others.
  • The pump’s generic GSL392 design means performance can vary.

• Best for: Builders who prioritize excellent customer support and need the core pump and regulator components for their LS swap, with the flexibility to source specific fittings as needed.

User feedback summary: Users appreciated the straightforward nature of this kit, noting that the pump and regulator performed as expected for their LS swaps. The responsiveness of customer service was a recurring positive comment, giving many confidence in their purchase. Some found that they needed to supplement the kit with a few extra fittings for a truly custom fit, but overall were satisfied with the core products.

4. Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel…

The Yezoauto fuel pump focuses solely on the pump itself, making it an ideal choice if you already have a regulator, or prefer to mix and match components for your LS swap high-pressure EFI fuel system. This is a direct replacement/equivalent for the popular Walbro TI GSL392, ensuring you get a known performance standard. What I find particularly helpful here is the detailed installation guide provided in the product features, which can be a lifesaver for DIYers. It really emphasizes the brand’s commitment to ensuring a successful installation, not just selling a part. Plus, with a 1-year warranty and a promise of swift customer support, you’re not left in the lurch if issues arise.

• Key Features:

  • 255LPH Inline High Pressure EFI Fuel Pump, compatible with Walbro TI GSL392.
  • Interchange part numbers GSL392, 400-939, for easy cross-referencing.
  • Detailed installation steps provided in the product description.
  • Equipped to provide clean pressurized fuel to injectors.
  • Backed by a 1-year warranty and responsive customer support.

• Pros:

  • Known performance standard as a GSL392 equivalent.
  • Good choice for those who need just the pump, or are building a custom fuel system.
  • Comprehensive installation guidance is a significant benefit for DIYers.
  • Solid warranty and customer support offer peace of mind.
  • Suitable for a wide range of EFI applications, including performance builds.

• Cons:

  • This is a pump-only unit, so you’ll need to source your own regulator, filter, and fittings.
  • Might not be the absolute cheapest option if you factor in all other necessary components.

• Best for: DIY enthusiasts who need a reliable, standalone 255LPH inline fuel pump for their LS swap and appreciate detailed installation guidance and strong warranty support.

User feedback summary: Customers frequently mentioned the pump’s consistent performance and ease of integration into their existing or custom fuel systems. The detailed installation steps were highly praised by those new to fuel system work. While some had to buy additional parts, they found the pump itself to be a good value and reliable.

5. A-Premium Universal External Pump 255LPH High Pressure…

A-Premium offers a well-packaged solution for a universal 255LPH high-pressure inline fuel pump, also known as the GSL392. This kit is designed to provide you with the pump and most of the basic installation hardware you’d need to get it mounted and wired, making it a good starting point for various EFI applications. What stands out here is the explicit inclusion of items like a foam insulation sleeve and mounting clamps, suggesting that A-Premium has considered the practicalities of installation, including minimizing pump noise and vibration. The inclusion of electrical connections also streamlines the wiring process, reducing the need to hunt for small but crucial components.

• Key Features:

  • Universal External 255LPH High Pressure Inline Fuel Pump (GSL392).
  • Comprehensive package contents including foam insulation sleeve, mounting clamps, copper crush washers, eyelet terminals, and electrical nuts/star washers.
  • Includes 10mm to 3/8″ barb fittings for hose connections.
  • Designed for LS Returnless 6AN Engine Swap applications.
  • AMP: 20, indicating its power requirements.

• Pros:

  • Includes useful installation accessories like an insulation sleeve and electrical connectors.
  • A good starting point for a custom fuel system where you want to choose your own regulator.
  • Reliable 255 LPH flow rate suitable for many LS engine outputs.
  • Universal fitment for various EFI and performance applications.
  • Thoughtful inclusion of noise-reducing and mounting hardware.

• Cons:

  • This is a pump-only kit; a fuel pressure regulator and filter are not included, which might be a drawback for those seeking an all-in-one solution.
  • “Professional knowledge and skills” are explicitly recommended for installation, which might deter absolute beginners.

• Best for: Builders who need a high-quality GSL392-style inline fuel pump with essential mounting and wiring hardware, and prefer to source their fuel pressure regulator and filter separately.

User feedback summary: Users generally found this pump to be a solid performer, delivering consistent fuel pressure. The included insulation sleeve was a welcome addition, helping to reduce pump noise. Many appreciated the comprehensive set of mounting hardware and electrical connections, making the physical installation straightforward for their LS swap projects.

6. 1PZ GSL392 Inline Fuel Pump & 58 PSI Fuel Filter…

The 1PZ kit provides another complete package featuring the GSL392 inline fuel pump and a 58 PSI fuel filter regulator, designed specifically to meet the demands of LS swap projects. What immediately catches my eye is the detailed explanation of its flow capabilities – not just 255 LPH, but also its performance at 80 PSI, showing a strong output for higher-pressure or more demanding performance applications. This kind of detail helps you gauge if it’s truly up to the task for your particular build. The included 6AN adapter fittings and the 10-micron fuel filter are crucial for both ease of installation and engine protection. They also offer a 1-year warranty and a commitment to customer support, which is reassuring for such a critical component.

• Key Features:

  • GSL392 255 LPH high-pressure inline fuel pump with detailed flow rate specifications (e.g., 210+ LPH at 80 PSI).
  • 58 PSI fuel filter regulator with 10-micron filtration and 6AN adapter fittings.
  • Designed for returnless fuel supply in LS engine swaps and EFI conversions.
  • Compatible with 1999-2014 Chevy V8 LS-based engines (4.8L, 5.3L, 6.0L).
  • Comes with a 1-year free warranty and return/exchange services.

• Pros:

  • A comprehensive kit that includes pump, regulator, filter, and necessary fittings.
  • The detailed flow rate specs provide confidence in its performance capabilities.
  • Integrated 10-micron filter ensures clean fuel delivery and protects injectors.
  • Offers a convenient returnless fuel system setup.
  • Good warranty and customer support.

• Cons:

  • Similar to other GSL392-based kits, some users might find the mounting hardware basic.
  • While detailed on flow, it doesn’t explicitly mention noise reduction features.

• Best for: Enthusiasts seeking a well-documented and complete inline fuel pump and regulator kit for their LS swap, with specific attention to higher-pressure flow capabilities and strong warranty support.

User feedback summary: Many users praised this kit for its complete nature, finding that it significantly simplified their LS swap fuel system. The pump delivered consistent pressure, and the regulator performed perfectly at 58 PSI. The included fittings were a strong point, and the warranty was noted as a reassuring factor for long-term use.

7. JDMON Replacement For GSL392 Inline Fuel Pump & Fuel…

JDMON provides a solid replacement kit, featuring the dependable GSL392 inline fuel pump alongside a 58psi fuel filter pressure regulator, a common and effective pairing for LS engine swaps. This kit is all about utility and direct application, offering a no-nonsense approach to getting your fuel system sorted. It includes the crucial 6AN adapter fittings, which simplify connections for both the supply and return lines, aiming to create that sought-after returnless fuel supply. What I like about this kit is its clear focus on the application for LS engine switching and EFI conversions, making it a straightforward choice for those specific projects. It’s a complete bundle that focuses on giving you the core components with the necessary hook-ups.

• Key Features:

  • GSL392 inline fuel pump and 58psi fuel filter pressure regulator.
  • Designed specifically for LS engine switching and electronic fuel injection switching applications.
  • Includes 6AN adapter fittings for 3/8” male inlet, 3/8” female supply outlet, and 5/16” male return outlet.
  • Comprehensive package included with mounting cushion, clamps, washers, and electrical connections.
  • Replaces common part numbers like GSL392-400-939, 400-939, GF822, 19239926.

• Pros:

  • A complete kit with pump, regulator, and all essential mounting/electrical hardware.
  • Specifically tailored for LS swap and EFI conversion applications.
  • Offers a convenient returnless fuel system setup.
  • Good value for the included components.
  • The comprehensive package makes it easier for first-time installers.

• Cons:

  • Similar to other GSL392 kits, the exact manufacturing source might be a concern for some.
  • Explicitly states that professional knowledge is recommended for installation.

• Best for: DIYers and mechanics looking for a cost-effective and complete kit specifically designed for a returnless LS swap fuel system, including all the small but necessary installation bits.

User feedback summary: Customers frequently highlighted the convenience of having everything in one package, making their LS swap fuel system installation much smoother. The pump and regulator performed reliably, maintaining the correct 58 PSI. Many appreciated the included mounting and electrical hardware, which saved them time and extra purchases.

Comparison Insights for Your LS Swap Fuel Pump Choice

Choosing the right inline fuel pump for your LS swap really boils down to balancing convenience, budget, and specific needs. We’ve looked at several GSL392-style pumps, often paired with a 58 PSI fuel filter regulator, and there are some clear patterns.

If you’re looking for a truly comprehensive, all-in-one solution that includes the pump, regulator, filter, and most of the necessary AN fittings right out of the box, the GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator… from GSL392, Dasbecan, and 1PZ are strong contenders. They aim to provide everything you need for a returnless LS swap fuel system, significantly simplifying the plumbing and reducing guesswork. The Dasbecan kit particularly emphasizes meeting OEM standards, which can be a deciding factor for those prioritizing perceived durability. The 1PZ kit stands out with more detailed flow specifications, which is helpful if you’re trying to match pump output to specific engine power goals.

For those who already have some fittings, or prefer to mix and match components for a more custom setup, the Yezoauto and A-Premium options are excellent choices for a standalone 255 LPH inline fuel pump. The Yezoauto pump offers valuable detailed installation instructions and a good warranty, making it great for DIYers who appreciate guidance. The A-Premium pump is notable for including practical installation hardware like an insulation sleeve and electrical connectors, which can help with noise reduction and simplify wiring. Remember, with pump-only options, you’ll need to account for the cost and sourcing of a separate 58 PSI regulator and fuel filter.

The ZHSYMX kit lands somewhere in the middle, offering the core pump and regulator combo. Its main advantage lies in its strong emphasis on customer service, which can be a huge benefit if you encounter any issues during your build. While it provides the main components, you might need to acquire some additional minor fittings depending on your exact setup.

Ultimately, most of these kits revolve around the highly popular GSL392 255 LPH pump and a 58 PSI regulator, which is the gold standard for many stock to moderately modified LS engines. The main differentiators come down to the completeness of the included fittings and hardware, the brand’s commitment to customer support and warranty, and any specific quality assurances like meeting OEM standards. Think about your existing parts, your comfort level with sourcing extra components, and how much assistance you might want during installation when making your choice.

Final Verdict: Powering Your LS Swap with Confidence

Choosing the right inline fuel pump for your LS swap is a critical decision that impacts performance, reliability, and even your sanity during the build. Based on our deep dive, here’s how I’d break down the recommendations for different types of builders:

For the “Set It and Forget It” Builder: If you want a comprehensive, ready-to-install solution that covers most of your bases for a returnless LS swap fuel system, I’d lean towards the GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator… (from GSL392) or the Dasbecan GSL392 255LPH Inline Fuel Pump & 58PSI Fuel…. Both offer a complete package with pump, regulator, filter, and crucial fittings, making your life much easier. The Dasbecan edges out slightly if you prioritize meeting OEM standards.

For the “DIYer Who Appreciates Guidance”: If you prefer to buy a standalone pump and source your own regulator or have specific needs, but still want support for the pump, the Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel… is an excellent pick. Its detailed installation instructions and strong warranty provide invaluable peace of mind.

For the “Budget-Conscious but Quality-Minded” Builder: The ZHSYMX GSL392 255LPH Inline Fuel Pump & 58 PSI LS… offers a solid core pump and regulator combo, backed by an impressive commitment to customer service. It’s a great way to get the essentials without overspending, leaving room to customize minor fittings.

For the “Attention to Detail” Builder: If you’re building a custom fuel system and want to ensure proper mounting and wiring from the start, consider the A-Premium Universal External Pump 255LPH High Pressure…. Its inclusion of an insulation sleeve and electrical hardware shows a thoughtful approach to the installation experience.

Regardless of your choice, remember that proper installation, secure wiring, and high-quality fuel lines are paramount. A great pump is only as good as the system around it. Happy swapping!

Comprehensive FAQ Section

Q1: Why do I need a specific inline fuel pump for an LS swap?
A: LS engines, being electronically fuel-injected (EFI), require much higher and more consistent fuel pressure (typically 58 PSI or 4 BAR) than older carbureted engines. An inline fuel pump designed for EFI applications can deliver this pressure reliably. Also, most LS swaps utilize a returnless fuel system, which requires a specific type of regulator, often integrated into the fuel filter, to maintain constant pressure at the fuel rail.

Q2: What does “255 LPH” mean, and is it enough for my LS swap?
A: LPH stands for Liters Per Hour, indicating the volume of fuel the pump can flow. A 255 LPH inline fuel pump is generally sufficient for stock to moderately modified LS engines (up to around 500-600 horsepower, depending on the specific engine and application). For higher horsepower or forced induction setups, you might need a larger pump (e.g., 340 LPH, 400 LPH) or even a dual-pump system.

Q3: What is a 58 PSI fuel filter regulator, and why is it important for an LS swap?
A: A 58 PSI fuel filter regulator is a component that performs two crucial functions: it filters the fuel (typically to 10 microns) to protect your injectors and engine, and it regulates the fuel pressure to a consistent 58 PSI before it reaches the fuel rail. This precise pressure is what LS engines are designed to operate at for optimal performance and efficiency. For returnless systems, this regulator bypasses excess fuel back to the tank, simplifying your plumbing.

Q4: Can I use an in-tank fuel pump instead of an inline fuel pump for my LS swap?
A: Yes, many LS swap projects successfully use in-tank fuel pumps. In-tank pumps are often quieter and run cooler because they’re submerged in fuel. However, they typically require modifying your fuel tank or using a specialized aftermarket tank. Inline fuel pumps are a popular choice because they offer a simpler, external installation, especially for vehicles where modifying the tank is difficult or undesirable.

Q5: What’s the difference between a “return” and “returnless” fuel system for an LS swap?
A: In a return fuel system, excess fuel that isn’t used by the engine is sent back to the fuel tank via a return line. The regulator is typically on the engine’s fuel rail. A returnless fuel system, commonly used in LS swaps, has the fuel pressure regulator integrated into a combined fuel filter/regulator unit, usually mounted closer to the tank. This unit maintains the 58 PSI output to the engine and returns excess fuel to the tank from that location, meaning only a single fuel line runs from the filter/regulator to the engine. This simplifies plumbing significantly.

Q6: What other components do I need besides the inline fuel pump and regulator for my LS swap fuel system?
A: Beyond the inline fuel pump for your LS swap and regulator, you’ll need:
* Fuel lines: High-quality, EFI-rated fuel lines (e.g., AN-6 or AN-8) to handle the pressure.
* Fittings: Appropriate AN fittings for your pump, regulator, fuel tank, and fuel rail.
* Fuel tank/sump: A clean, rust-free tank. If using an external pump, a fuel tank sending unit and possibly a sump might be needed.
* Wiring: Proper gauge wiring for the fuel pump, including a relay and fuse, to ensure it receives adequate power.
* Clamps and mounting hardware: To securely mount the pump and route lines.

Q7: How do I wire an inline fuel pump for an LS swap correctly?
A: Proper wiring is crucial for the longevity and performance of your inline fuel pump for an LS swap. Always use a dedicated fuel pump relay, triggered by the engine’s ECU (or a standalone controller). Power for the pump should come directly from the battery via a fused, heavy-gauge wire (typically 10-12 gauge), routing through the relay. The pump’s ground should be connected to a clean, chassis ground point. Never power the pump directly through the ignition switch, as this can lead to voltage drops and pump failure.