Best Inline Fuel Pumps for LS Swap Applications

Okay, so you’ve decided to drop an LS engine into your project car – awesome! I’ve been there, and I know one of the trickiest parts, often overlooked until crunch time, is getting your fuel system right. You can have the most powerful LS engine, but if it’s not getting consistent, clean fuel at the correct pressure, it’s just a fancy paperweight. That’s why choosing the best inline fuel pump for LS swap applications is absolutely critical. For many LS swaps, especially those using returnless fuel systems, an external inline pump paired with a 58 PSI filter/regulator is the go-to solution. It’s cost-effective, relatively easy to install, and incredibly reliable when you pick the right components. I’ve dug into some of the top options out there, looking for pumps and kits that offer solid performance, good value, and make your LS swap journey a little smoother. In this guide, we’ll break down five popular choices, compare their benefits, and help you find the perfect setup for your build. Let’s get your LS fed right!

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

GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator Kit

When I’m looking at inline fuel pumps for an LS swap, a comprehensive kit like this one from Yinlowa really catches my eye. It’s not just a pump; it’s a solution designed to simplify your fuel system. This kit provides a reliable GSL392 high-pressure fuel pump capable of delivering ample fuel for most EFI applications, even those with turbo or superchargers. What really makes it stand out is the included 58 PSI fuel filter regulator, which is essential for achieving the correct pressure for LS engines while also filtering your fuel. The kit even throws in the necessary 6AN adapter fittings, making the plumbing aspect much less of a headache. Installation is straightforward with the included mounting bracket and rubber insulator, allowing for flexible placement whether it’s under the car or in the engine bay.

• Integrated 58 PSI Fuel Filter Regulator: Delivers consistent 58 PSI fuel pressure and filters fuel to 10 microns.
• High-Flow GSL392 Pump: Provides 255 LPH (Liters Per Hour) at 80 PSI, suitable for performance applications.
• Complete Kit: Includes pump, filter/regulator, and 6AN adapter fittings (3/8” EFI push-on, 5/16” EFI push-on, 6AN male to 3/8 male EFI fitting).
• Broad Compatibility: Fits various 1999-2014 Chevy V8 4.8L, 5.3L, 6.0L LS-based engines.
• Easy Installation: Comes with a mounting bracket and rubber insulator for flexible placement.

Pros:
– Comprehensive kit simplifies returnless LS swap fuel system.
– Reliable 255 LPH pump supports many performance setups.
– Includes crucial 58 PSI regulator and all necessary AN fittings.
– Good filtration for engine protection.
– Comes with a 12-month warranty and lifetime technical support.

Cons:
– May require additional fuel lines depending on your specific setup.
– Some users might prefer a different brand of filter/regulator.

Best for: DIYers looking for a complete, all-in-one solution for their returnless LS swap fuel system.

User feedback summary: Many users appreciate the completeness of the kit, noting that it significantly streamlines the LS swap fuel system installation. They often highlight the pump’s reliability and the regulator’s consistent pressure output, making it a popular choice for budget-conscious but quality-focused builders.

Dasbecan GSL392 255LPH Inline Fuel Pump & 58PSI Fuel Filter Regulator Kit

Another strong contender for inline fuel pumps for LS swap applications is this kit from Dasbecan. Much like the previous option, it provides the essential components for a hassle-free returnless fuel system. You get the robust GSL392 255 LPH inline fuel pump, known for its high-pressure performance suitable for many EFI and boosted setups. The package also includes the vital 58 PSI fuel filter regulator, ensuring your LS engine gets the precise pressure it needs. What’s great here is the specific inclusion of multiple AN fittings – 6AN to 3/8″ Push-In for EFI, and two black LS1/LT1 -6AN to 3/8″ and one -6AN to 5/16″ fittings – which are commonly needed for various LS configurations. The components are manufactured with quality in mind, boasting a rugged metal housing for durability.

• High-Performance GSL392 Pump: 255 LPH flow rate at 58 PSI, 20 AMP draw, ideal for EFI and boosted applications.
• Essential 58 PSI Filter Regulator: Ensures correct fuel pressure for LS engines.
• Extensive Fitting Kit: Includes a variety of 6AN fittings to suit different LS swap plumbing needs.
• OEM Standard Quality: Manufactured with high-quality materials for durability and optimal performance.
• Wide LS Compatibility: Designed for 1999-2014 Chevy V8 4.8L, 5.3L, 6.0L LS-based engines.

Pros:
– Comprehensive kit saves time sourcing individual components.
– High-quality pump and regulator ensure reliable fuel delivery.
– Generous selection of AN fittings included for versatile installation.
– Rugged construction promises longevity.
– Meets or exceeds OEM standards for peace of mind.

Cons:
– Installation kit might still require specific fuel lines depending on your vehicle.
– Could be seen as a bit redundant if you already have some fittings.

Best for: Builders who appreciate a complete, high-quality kit with a good assortment of fittings for a reliable returnless LS swap.

User feedback summary: Users frequently praise this kit for its comprehensive nature and robust build quality. Many found the included fittings to be very helpful, minimizing trips to the parts store. The pump and regulator are consistently reported as performing as expected, holding steady fuel pressure without issue.

ZHSYMX GSL392 255LPH Inline Fuel Pump & 58 PSI LS EFI Fuel Pressure Regulator Kit

The ZHSYMX kit offers another solid option if you’re exploring inline fuel pumps for your LS swap. This package centers around the well-regarded GSL392 255 LPH high-pressure inline fuel pump, which is more than capable of handling most EFI and even turbo/supercharged applications with its 255 LPH flow rate. Crucially for any LS project, it comes bundled with the 58 PSI LS EFI Fuel Pressure Regulator Kit, providing the correct pressure and a returnless setup. Compatibility is broad, covering a wide range of popular LS engines from 1999-2014. While the details on included fittings are a bit less explicit than some other kits, it does mention an “Installation Kit” and focuses on delivering high-quality products and customer service.

• Universal GSL392 Pump: 255 LPH high-pressure flow, suitable for diverse EFI and boosted applications.
• Dedicated 58 PSI LS EFI Fuel Pressure Regulator: Ensures precise fuel pressure for LS engines.
• Broad LS Engine Compatibility: Fits 1999-2014 Chevy V8 4.8L, 5.3L, 6.0L LS-based engines.
• “Installation Kit” Included: Suggests basic mounting hardware is provided.
• Customer Service Focus: Emphasizes high-quality products and responsive support.

Pros:
– Reliable GSL392 pump and 58 PSI regulator combo.
– Good for both naturally aspirated and mild boosted LS swaps.
– Specific compatibility with common LS engine generations.
– Focus on customer experience is a plus.

Cons:
– Less detail on specific AN fittings included compared to some other kits.
– “Installation Kit” is a bit vague on contents.

Best for: Those seeking a reliable GSL392 pump and 58 PSI regulator combination for their LS swap, with an emphasis on a strong customer service experience.

User feedback summary: Users generally find this kit to be a good value, providing the essential components needed for an LS swap fuel system. They often comment on the pump’s consistent performance and the regulator’s ability to maintain the required pressure, making it a straightforward choice for many builders.

Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel Pump

Sometimes, you just need the pump itself, especially if you’re piecing together your own fuel system or replacing an existing inline fuel pump for an LS swap. That’s where the Yezoauto 255LPH pump comes in. This is a direct replacement compatible with the popular Walbro TI GSL392, meaning you’re getting a proven design known for its reliability and strong flow. It provides that crucial 255 LPH needed for many EFI applications, including LS swaps. The description goes into some detail about the general function of a fuel pump, underscoring its role in delivering clean, pressurized fuel to your injectors. While it doesn’t come with the filter/regulator or an array of fittings like the full kits, it’s a solid standalone pump backed by a 1-year warranty for peace of mind.

• Direct GSL392 Replacement: Compatible with Walbro TI GSL392, ensuring proven design and performance.
• High Flow Rate: Delivers 255 LPH, suitable for most LS swap EFI applications.
• Reliable Performance: Focus on supplying clean, pressurized fuel to injectors.
• 1-Year Warranty: Provides assurance and support from the manufacturer.
• Interchange Part Numbers: OE# GSL392, 400-939, GSL392-400-939.

Pros:
– Proven GSL392 design ensures reliability.
– Excellent flow rate for many LS engines.
– Good option for replacing a pump or building a custom system.
– 1-year warranty adds buyer confidence.

Cons:
– Does NOT include the crucial 58 PSI fuel filter regulator or AN fittings (must be sourced separately for an LS swap).
– Only the pump, not a complete kit.

Best for: Builders who already have or plan to independently source their 58 PSI fuel filter regulator and fittings, or who are directly replacing an existing GSL392 pump in their LS swap.

User feedback summary: Users who bought this pump primarily for replacement or as part of a custom build were generally satisfied with its performance and direct fit. They noted it reliably delivered the expected flow and pressure, serving as a cost-effective alternative to higher-priced branded options when only the pump was needed.

A-Premium Universal External Pump 255LPH High Pressure Inline Fuel Pump

Finally, we have the A-Premium Universal External Pump, another excellent choice if you’re focusing on the pump component itself for your LS swap fuel system. This is a 255 LPH high-pressure inline fuel pump (GSL392 equivalent) that comes with a basic installation kit. What’s notable here is the inclusion of essential mounting hardware and some fittings, specifically 10mm to 3/8″ barb fittings, which are useful for connecting to standard fuel hoses. While it lacks the integrated 58 PSI regulator, it’s designed to be a robust, universal pump for EFI applications. The clear warning about professional installation highlights the importance of proper setup for optimal performance and safety, which is always a good reminder for fuel system work.

• Universal GSL392 Equivalent Pump: 255 LPH flow rate, suitable for various EFI and performance applications.
• Basic Installation Kit: Includes foam insulation sleeve, mounting clamps, electrical terminals, and 10mm to 3/8″ barb fittings.
• Robust Performance: 255 LPH flow at 20 AMP, capable for most LS swaps (when paired with correct regulator).
• Reference Numbers: GSL392, 400-939 for easy cross-referencing.
• Professional Installation Recommended: Emphasizes the need for expertise for proper setup.

Pros:
– Reliable 255 LPH GSL392-style pump.
– Comes with essential mounting hardware and some basic barb fittings.
– Good value for the pump and basic kit.
– Clear warning about professional installation promotes safety.

Cons:
– Does NOT include the critical 58 PSI fuel filter regulator for LS swaps (must be purchased separately).
– Barb fittings may not be ideal for all AN-style LS swap setups, potentially requiring additional adapters.

Best for: Enthusiasts who need a reliable GSL392-style pump and basic mounting hardware, plan to use barb fittings for their fuel lines, and will purchase their 58 PSI fuel filter regulator separately for their LS swap.

User feedback summary: Users found this pump to be a dependable workhorse, often praising its consistent performance for its price point. While some mentioned the need to source the regulator and specific AN fittings separately, they were happy with the pump and the basic installation hardware included.

Helpful Comparison Insights

When you’re sifting through these inline fuel pumps for LS swap applications, you’ll notice a lot of similarities, especially around the GSL392 255 LPH specification. This is a testament to how well this pump design works for many LS engines. However, the real differences lie in what else comes in the box.

For a true “plug-and-play” experience for a returnless LS swap, kits like the GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator from Yinlowa and the Dasbecan GSL392 255LPH Inline Fuel Pump & 58PSI Fuel Filter Regulator are clear winners. They include the pump, the absolutely vital 58 PSI filter/regulator, and a good selection of AN fittings. This means less time hunting for individual parts and a more straightforward installation. The Dasbecan kit, in particular, seems to offer a slightly more diverse set of AN fittings, which can be a small but significant convenience depending on your specific plumbing needs. The Yinlowa kit also sweetens the deal with a 12-month warranty, offering a bit more peace of mind.

The ZHSYMX GSL392 kit also includes both the pump and the 58 PSI regulator, making it a complete solution for the core fuel delivery system. While it’s a solid choice, the description is a bit less specific about the types and number of AN fittings included, so you might need to confirm or plan for some extra fittings if you choose this one.

On the other hand, the Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel Pump and the A-Premium Universal External Pump are primarily just the pump itself. They’re excellent if you’re replacing an existing pump or if you’re building a highly customized fuel system where you want to hand-pick every other component, especially your 58 PSI fuel pressure regulator and all your specific AN or barb fittings. The A-Premium does include a basic installation kit with some barb fittings and mounting hardware, which is a nice touch if you’re planning on using those types of connections. However, if you opt for these stand-alone pumps, remember that you absolutely must source a separate 58 PSI fuel filter regulator for a proper LS swap. Without it, your engine won’t run correctly, if at all.

All these pumps are rated at 255 LPH, which is generally sufficient for stock to moderately modified LS engines, including those running mild boost. For highly boosted or extremely high-horsepower LS applications, you might need to consider a higher-flow pump or dual pumps, but for most everyday and performance street swaps, these will do the job beautifully.

Final Verdict

Alright, so you’ve got a lot of great options for inline fuel pumps for your LS swap. If I were making a blanket recommendation for most DIYers and builders, I’d lean heavily towards the Dasbecan GSL392 255LPH Inline Fuel Pump & 58PSI Fuel Filter Regulator Kit or the GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator from Yinlowa. These kits truly offer the best value because they include all the critical components – the reliable 255 LPH pump, the essential 58 PSI filter/regulator, and a good assortment of AN fittings. They take a lot of guesswork and extra shopping out of the equation, making your LS swap fuel system installation much smoother.

Now, if you’re on a tighter budget, or if you already have some fittings lying around, the ZHSYMX GSL392 kit is a strong contender that still gives you the pump and regulator combination. It’s a solid, no-frills choice.

However, if you’re a seasoned builder, someone replacing just the pump, or planning a highly customized fuel system where you want to choose every single fitting and regulator brand yourself, then the standalone pumps like the Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel Pump or the A-Premium Universal External Pump are excellent foundations. Just remember the golden rule: always pair these with a high-quality, separate 58 PSI fuel filter regulator for your LS engine to run its best. Whichever you choose, getting your fuel system right is paramount for a successful and enjoyable LS swap!

Comprehensive FAQ Section

Q1: Why do I need an inline fuel pump for an LS swap?
A: Many LS swaps involve putting a modern EFI engine into a car that originally had a carbureted engine or a different type of fuel system. An inline fuel pump for an LS swap provides the high fuel pressure (typically 58 PSI) and flow rate required by modern fuel injectors, which old fuel systems simply can’t deliver. It’s also often chosen for its ease of installation outside the fuel tank, simplifying the fuel system conversion.

Q2: What is the significance of the 58 PSI fuel filter regulator for LS swaps?
A: LS engines are designed to run with a specific fuel pressure, usually 58 PSI (or 4 BAR). A dedicated 58 PSI fuel filter regulator ensures this constant pressure is maintained at the fuel rail. It also acts as a fuel filter, protecting your injectors, and critically, it usually creates a “returnless” style fuel system. This simplifies plumbing by integrating the return function into the filter/regulator itself, eliminating the need for a separate return line from the engine bay.

Q3: Is a 255 LPH fuel pump sufficient for my LS swap?
A: For most stock to moderately modified LS engines, including those with basic bolt-ons and even mild boost, a 255 LPH (Liters Per Hour) inline fuel pump for an LS swap is generally sufficient. It provides ample fuel flow to support around 450-550 horsepower at the wheels, depending on the engine’s efficiency and fuel type. For highly boosted or extreme horsepower builds, you might need a larger single pump or a dual pump setup.

Q4: Do these kits come with everything I need for installation?
A: The more comprehensive kits, like the Dasbecan or Yinlowa, come with the pump, the 58 PSI fuel filter regulator, and various AN adapter fittings, which significantly reduce the additional parts you’ll need. However, you will still need to purchase appropriate fuel lines (e.g., braided stainless, PTFE, or hard lines) and potentially some additional clamps or mounting hardware specific to your vehicle’s layout. Standalone pumps (like Yezoauto or A-Premium) will require you to source the regulator and most fittings separately.

Q5: Where should I mount my inline fuel pump for an LS swap?
A: The ideal location for an inline fuel pump for an LS swap is typically as close to the fuel tank as possible, preferably below the fuel tank’s lowest point. This allows the pump to “push” fuel rather than “pull” it, which is more efficient and reduces the risk of cavitation. Ensure it’s mounted securely, away from heat sources, and protected from road debris.

Q6: Can I use my original fuel tank with an inline fuel pump?
A: Yes, in many cases, you can use your original fuel tank. You’ll need to ensure your tank is clean and free of rust or debris. You’ll also likely need to modify the tank to install a pick-up tube with a proper fuel sock (filter) that sits at the bottom of the tank to prevent fuel starvation, especially during spirited driving or low fuel levels. Many people choose to add a bulkhead fitting to the top of the tank for a cleaner connection to the inline fuel pump for an LS swap system.

Q7: What kind of fuel lines should I use with these inline fuel pumps?
A: For an LS swap, it’s highly recommended to use high-quality fuel lines rated for high pressure and suitable for modern fuels (including ethanol blends). Common choices include AN-style braided stainless steel lines with PTFE or rubber inner cores, or high-pressure EFI-rated rubber hose, sometimes paired with hard lines. Ensure all fittings and hose ends are compatible with your chosen fuel line type and designed for EFI pressures.

Q8: How do I know if the GSL392 pump is a genuine part or a replica?
A: Most of the pumps listed here are aftermarket equivalents or compatible with the original Walbro TI GSL392 design. While they might not be “genuine Walbro” branded, they aim to replicate its performance and reliability. It’s crucial to purchase from reputable sellers and look for positive user feedback regarding their longevity and performance. The GSL392 model number itself has become synonymous with this particular pump design due to its widespread use in performance applications.