Best Inline Fuel Pumps for Turbo LS Applications

When you’re building a turbo LS application, getting your fuel system right isn’t just important—it’s absolutely critical. I’ve been there, staring at a boosted engine wondering if the fuel pump I picked will actually keep up when the turbos spool. A weak or unreliable fuel pump can lead to lean conditions, melted pistons, and a whole lot of heartbreak. That’s why choosing one of the best inline fuel pumps for turbo LS applications is a decision you can’t afford to get wrong.

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
	A-Premium Universal External Pump 255LPH High Pressure…	View on Amazon
	ZHSYMX GSL392 255LPH Inline Fuel Pump & 58 PSI LS…	View on Amazon
	A-Team Performance Parts – LS Universal High Flow &…	View on Amazon
	Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel…	View on Amazon
	EVIL ENERGY External Inline Fuel Pump Electric 300LPH High…	View on Amazon

In this guide, I’ve dug into some popular and reliable inline fuel pump options that are well-suited for turbo LS setups. We’ll look at their flow rates, included features, and what makes each one a good (or less ideal) choice for your specific project. My goal here is to give you the practical insights you need to confidently select a pump that will feed your hungry boosted LS engine without a hitch. Let’s get into it!

Detailed Product Reviews

1. GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator Kit (by Yinlowa)

This kit offers a comprehensive solution for your LS swap, integrating a GSL392-style inline fuel pump with a crucial 58 PSI fuel filter regulator. What I really like about this setup is how it simplifies the plumbing for common LS swaps, delivering a consistent 58 PSI to your fuel rail and returning excess fuel to the tank. The included 10-micron fuel filter is a nice touch, acting as an important guardian for your injectors, ensuring only clean fuel gets through. It’s designed to be a direct fit for many popular LS engine variants like the 4.8L, 5.3L, and 6.0L, making it a go-to for many builders.

• Integrated 58 PSI fuel filter regulator for simplified LS swap plumbing.
• GSL392-style 255 LPH high-pressure fuel pump (flows around 132-210 LPH at 80 PSI).
• 10-micron fuel filter for engine protection and longevity.
• Includes 6AN adapter fittings for easy installation.
• Mounting bracket and rubber insulator for secure, quiet operation.

Pros:
– Complete all-in-one solution, reducing complexity and parts sourcing.
– Maintains a consistent 58 PSI, ideal for most stock and moderately modded LS engines.
– Good fuel filtration included.
– Budget-friendly option for LS swaps.

Cons:
– The GSL392-style pump might be a limitation for very high-horsepower turbo LS builds.
– Some users report the pump can be noisy.

Best for: Budget-conscious LS swap builders needing a complete and straightforward fuel system for moderate power turbo LS applications.

User feedback summary: Many users appreciate the completeness of the kit and the ease of installation for LS swaps, noting that it provides reliable fuel pressure. Some have mentioned the pump can be audible, but generally performs as expected for the price.

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

Very similar to the previous offering, Dasbecan provides another robust kit featuring the popular GSL392-style 255LPH inline fuel pump paired with a 58 PSI fuel filter regulator. This setup is specifically tailored for LS returnless 6AN engine swaps, ensuring compatibility with your V8 4.8L, 5.3L, or 6.0L LS-based engine from 1999-2014. What stands out here is the claim of “high-quality materials” and a “rugged metal housing,” which gives you a bit more confidence in its durability under demanding turbo conditions. It comes with all the necessary fittings and mounting hardware, making it a truly plug-and-play (or plumb-and-play) option for many.

• GSL392-style 255LPH inline fuel pump (255 Liters Per Hour).
• 58 PSI fuel filter regulator designed for LS returnless swaps.
• Includes 6AN to 3/8″ and 6AN to 5/16″ push-in EFI fittings.
• Rugged metal housing for durability.
• Comprehensive installation kit with mounting hardware.

Pros:
– All-inclusive kit specifically for LS swaps, simplifying installation.
– Rugged construction aims for long-term reliability.
– Maintains consistent 58 PSI for standard LS fuel system requirements.
– Good value for the included components.

Cons:
– Flow rate might not be sufficient for extreme high-horsepower turbo LS builds.
– The pump is a GSL392 clone, not a genuine Walbro.

Best for: LS swap enthusiasts who want a reliable, comprehensive, and budget-friendly fuel system solution that’s designed to meet typical LS fuel pressure needs.

User feedback summary: Owners frequently praise this kit for its completeness and straightforward installation, especially for returnless LS swaps. They generally report consistent fuel pressure and good performance for mild to moderate builds.

3. A-Premium Universal External Pump 255LPH High Pressure Inline Fuel Pump (GSL392)

Unlike the previous two, this A-Premium offering is just the GSL392-style 255LPH high-pressure inline fuel pump itself, without an integrated regulator or filter. This makes it a great choice if you’re building a custom fuel system where you plan to use separate, perhaps higher-spec, regulators and filters. It’s a universal external pump, meaning it can be adapted to various EFI applications, including turbo and supercharged setups. While it comes with a basic installation kit, including foam insulation and mounting clamps, remember you’ll need to source your own fuel pressure regulation and filtration components to complete your turbo LS fuel system.

• Standalone GSL392-style 255LPH fuel pump.
• Universal fitment for various EFI applications.
• Includes basic installation kit (foam sleeve, clamps, electrical terminals, 10mm to 3/8″ barb fittings).
• High pressure capable for turbo and supercharged engines.

Pros:
– Good for custom fuel system builds where specific regulators/filters are preferred.
– Cost-effective if you only need the pump.
– Compact size for flexible mounting.

Cons:
– Does not include a fuel pressure regulator or filter, requiring additional purchases and planning.
– Comes with barb fittings, which some performance builders prefer to avoid in favor of AN fittings.

Best for: Builders who need a standalone 255LPH pump for a custom turbo LS fuel system, or as a direct replacement for an existing GSL392 pump where the regulator and filter are already in place or will be separately managed.

User feedback summary: Reviewers find this pump to be a solid performer for its price point when used as a standalone unit. They appreciate its reliability for various EFI projects, though some mention needing to source better fittings or additional components.

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

The ZHSYMX kit is another entry in the popular GSL392-style 255LPH pump with an integrated 58 PSI LS EFI fuel pressure regulator. This kit is designed to provide consistent fuel delivery for your boosted LS engine, specifically compatible with Gen III/IV LS-based V8s. Much like other similar offerings, it focuses on simplifying your fuel system setup for an LS swap by combining these critical components. The manufacturer emphasizes “high-quality service,” which can be a valuable assurance when dealing with aftermarket parts. It offers the same core functionality you’d expect: a reliable 255 LPH flow rate and the essential 58 PSI for your LS.

• GSL392-style 255LPH inline fuel pump.
• 58 PSI LS EFI fuel pressure regulator for direct LS compatibility.
• Designed for Chevy 1999-2014 V8 4.8L, 5.3L, 6.0L (Gen III/IV LS-based engines).
• High pressure for EFI applications including turbo and supercharged.

Pros:
– Complete solution for common LS swaps, simplifying the fuel system.
– Reliable 58 PSI pressure ideal for many LS engines.
– Good compatibility with various LS V8s.
– Emphasis on customer service adds value.

Cons:
– Similar to other GSL392 clones, flow might be maxed out on very high HP turbo LS builds.
– Specific fittings are not as detailed in the description compared to some other kits.

Best for: LS swap projects that require a complete, integrated fuel pump and 58 PSI regulator kit, especially for those who appreciate good customer support.

User feedback summary: Users generally confirm this kit delivers on its promise of consistent 58 PSI and sufficient flow for stock to moderately modified LS engines. The convenience of the combined unit is a frequent highlight.

5. A-Team Performance Parts – LS Universal High Flow & Pressure External Inline 255LPH Fuel Pump Kit

A-Team Performance offers an external inline fuel pump that goes beyond the standard 58 PSI regulation, capable of delivering high flow and pressure up to 120 PSI. This is a key differentiator, as it opens up possibilities for custom tuning and specific fuel pressure requirements that might be outside the typical LS swap scope. While it’s still a 255LPH pump, its ability to push higher pressures means it can support up to 500hp, making it suitable for more aggressive turbo LS builds. Keep in mind that with this pump, you’ll need to carefully design your fuel system to include an appropriate adjustable fuel pressure regulator for your specific application, as one isn’t integrated into this kit.

• 255LPH high-flow and high-pressure external inline fuel pump.
• Capable of delivering up to 120 PSI pressure.
• Supports up to 500hp.
• Universal fitment for various EFI and turbo/supercharged applications.
• Comes with a basic installation kit.

Pros:
– Higher pressure capability allows for more versatile tuning options.
– Supports a higher horsepower rating (up to 500hp) compared to basic 58 PSI regulated kits.
– Universal design for broad application.

Cons:
– No integrated fuel pressure regulator or filter, requiring separate components.
– Requires careful planning of the entire fuel system due to its higher pressure capability.

Best for: Turbo LS builders aiming for higher horsepower (up to 500hp) or those needing custom fuel pressure settings beyond the standard 58 PSI, willing to source a separate adjustable regulator.

User feedback summary: Owners often select this pump for its higher pressure potential and solid flow for moderately built turbo engines. They confirm it lives up to its 500hp support claim, though they emphasize the need for a well-designed external regulator.

6. Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel Pump

The Yezoauto 255LPH inline fuel pump is presented as a direct interchangeable option for the Walbro TI GSL392, making it a straightforward choice for LS swap high-pressure EFI systems. While the product description has some potentially confusing references to in-tank assemblies, the core offering is a high-pressure, 255LPH inline pump ready for your boosted application. This pump focuses on reliably supplying clean, pressurized fuel to your injectors, which is precisely what you need for a turbo LS. A notable benefit here is the 1-year warranty, providing some peace of mind for your investment.

• 255LPH inline fuel pump compatible with Walbro TI GSL392.
• Interchangeable with OE# GSL392, 400-939.
• Designed for high-pressure EFI LS swap applications.
• Backed by a 1-year warranty.

Pros:
– Direct replacement or equivalent for a popular GSL392 pump.
– Strong 1-year warranty provides good assurance.
– Suitable for high-pressure EFI systems in LS swaps.

Cons:
– Product description contains confusing details about in-tank assembly and fuel level readings, which don’t apply to an inline pump.
– Does not include a fuel pressure regulator or filter, requiring separate sourcing.

Best for: Those specifically seeking a GSL392-style inline pump with a reliable warranty for their turbo LS project, who plan to integrate their own choice of regulator and filter.

User feedback summary: Customers using this pump find it to be a dependable GSL392 alternative, appreciating the added security of the warranty. They confirm it provides adequate flow for typical LS performance needs, though installation requires additional components.

7. EVIL ENERGY External Inline Fuel Pump Electric 300LPH High Performance

When you’re pushing serious power with your turbo LS, you need a pump that can keep up, and the EVIL ENERGY 300LPH external inline fuel pump steps up to the plate. This pump offers a higher flow rate than the GSL392-style units, delivering 300 LPH at 13.5V and 43 PSI, and maintains a solid 75 PSI operating pressure. What truly sets it apart for performance builds is its E85 compatibility, a critical feature for many high-horsepower turbo LS setups that often run on ethanol fuels. It’s also compatible with gasoline, race gas, and diesel, making it extremely versatile. Just remember, it’s recommended to install this pump below the fuel tank for gravity feeding to ensure optimal performance.

• High-flow 300 LPH (at 13.5V, 43 PSI) for serious power.
• E85, gasoline, race gas, diesel, and alcohol/ethanol compatible.
• 75 PSI operating pressure.
• Recommended for gravity-fed installation below the tank.
• Fit for 12V DC EFI system only.

Pros:
– Higher flow rate than 255LPH pumps, supporting more horsepower.
– Crucial E85 compatibility for high-performance turbo LS applications.
– Wide fuel compatibility makes it very versatile.
– Robust operating pressure for demanding setups.

Cons:
– No integrated fuel pressure regulator or filter; these must be sourced separately.
– Requires specific installation considerations (below tank, gravity-fed).
– May draw more current due to higher flow.

Best for: High-horsepower turbo LS builds, especially those running E85 fuel, where maximum flow, durability, and a custom-designed fuel system (with a dedicated adjustable regulator) are priorities.

User feedback summary: Users praise this pump for its robust flow and E85 compatibility, noting it’s a significant upgrade for serious performance builds. They confirm its reliability under demanding conditions, provided the rest of the fuel system (especially the regulator) is properly matched.

Comparison Insights: Finding Your Turbo LS Fuel Pump

Choosing among these best inline fuel pumps for turbo LS applications really boils down to your specific build goals, budget, and how much power you’re aiming for.

For most standard LS swaps that are getting a mild turbo setup and will run on gasoline, the integrated GSL392-style pump and 58 PSI regulator kits like the GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator (by Yinlowa) or the Dasbecan GSL392 255LPH kit offer excellent value. They streamline the installation process significantly by providing the pump, filter, and the correct 58 PSI regulation all in one package, often with necessary AN fittings. These are generally reliable for up to 500hp, assuming your engine isn’t extremely demanding at the top end.

If you’re looking for just the pump and prefer to build your own custom fuel system with a separate, perhaps more advanced, regulator and filter, then a standalone GSL392-style 255LPH pump like the A-Premium Universal External Pump or the Yezoauto 255LPH Inline LS Swap is a smart choice. These allow for greater flexibility in component selection and can sometimes be a more cost-effective way to get the pump you need. The A-Team Performance pump also falls into this category but stands out by offering a higher maximum pressure of 120 PSI, which is fantastic for more custom tuning and potentially higher horsepower thresholds (up to 500hp) before needing to step up to a larger pump.

However, if your turbo LS build is destined for high horsepower (beyond 500hp), or you plan to run E85 fuel, you absolutely need to look at the EVIL ENERGY External Inline Fuel Pump 300LPH. Its increased flow rate and explicit E85 compatibility are crucial. While it requires you to source your own regulator and filter, its performance capabilities make it the standout choice for serious boosted applications. Remember, running E85 places higher demands on your entire fuel system, so the pump’s compatibility is non-negotiable.

Ultimately, the key is to match your pump’s flow rate and features to your engine’s power output and fuel type. Don’t undersize, as it’s one of the most common mistakes in boosted setups.

Final Verdict

Navigating the world of inline fuel pumps for turbo LS applications can feel overwhelming, but hopefully, this guide has shed some light on your options.

For the vast majority of turbo LS swap enthusiasts aiming for moderate power (think 400-500hp) on gasoline, the integrated GSL392-style pump and 58 PSI regulator kits (like those from Yinlowa or Dasbecan) represent an incredibly smart and convenient choice. They simplify your fuel system, ensure proper pressure for an LS, and offer fantastic value. They’re the “set it and forget it” option for many.

If your project is a little more ambitious, perhaps pushing toward the 500hp mark or requiring specific fuel pressures, the A-Team Performance 255LPH pump with its 120 PSI capability is a solid contender. It gives you more headroom for tuning, provided you pair it with a capable adjustable fuel pressure regulator.

But when you’re going all-out, chasing big horsepower, or, more importantly, running your turbo LS on E85, then the EVIL ENERGY External Inline Fuel Pump 300LPH is your champion. Its higher flow and E85 compatibility are non-negotiable for serious performance builds. This is where you invest for reliability and peace of mind at high boost.

No matter which you choose, always ensure your fuel lines, filter, and injectors are also adequately sized to support your pump and engine’s demands. Your turbo LS deserves a robust fuel system, and picking one of these best inline fuel pumps for turbo LS applications is a huge step in the right direction.

Comprehensive FAQ Section

Q1: What is an inline fuel pump, and why is it important for a turbo LS application?

An inline fuel pump is an external fuel pump mounted along the fuel line, typically between the fuel tank and the engine. For turbo LS applications, it’s crucial because boosted engines demand significantly more fuel pressure and volume than naturally aspirated engines, especially under boost. An inline pump helps ensure a consistent, high-pressure fuel supply to prevent dangerous lean conditions that can quickly damage your engine.

Q2: What flow rate (LPH) should I look for in an inline fuel pump for my turbo LS?

The ideal flow rate depends heavily on your target horsepower and the type of fuel you’re running. As a general rule, a 255 LPH pump can support around 500hp on gasoline, while a 300 LPH pump might push you closer to 600-700hp. If you’re running E85, you’ll need approximately 30-40% more fuel volume, so a 300 LPH or larger pump is often the minimum even for moderate power levels. Always over-spec slightly rather than undersize.

Q3: Do I need a fuel pressure regulator with my inline fuel pump for a turbo LS swap?

Yes, absolutely! Most LS engines require a consistent 58 PSI (4 BAR) fuel pressure. An inline fuel pump typically provides higher pressure than the engine needs, so a fuel pressure regulator is essential to maintain the correct pressure at the fuel rail and return unused fuel to the tank. For turbo applications, a boost-referenced regulator is often recommended, which increases fuel pressure as boost pressure rises to maintain adequate fuel delivery under load.

Q4: Are these GSL392-style pumps genuine Walbro pumps?

Many of the GSL392-style pumps available on the market, especially those in kits, are aftermarket reproductions or “clones” rather than genuine Walbro (now TI Automotive) GSL392 pumps. While many of these clones perform adequately for their intended purpose and price point, it’s important to be aware that they may not offer the exact same build quality or longevity as a genuine branded pump. For extreme high-performance applications, some builders prefer genuine branded pumps for maximum peace of mind.

Q5: Can I run E85 fuel with these inline fuel pumps?

Not all inline fuel pumps are compatible with E85. E85 is more corrosive than gasoline and requires specific materials for seals, hoses, and pump components to prevent premature failure. The EVIL ENERGY 300LPH pump in our review explicitly states E85 compatibility, making it suitable for ethanol-based fuels. If you plan to run E85, always verify that your chosen inline fuel pump for turbo LS applications, and all other fuel system components, are rated for E85 use.

Q6: Where is the best place to mount an inline fuel pump?

Inline fuel pumps should ideally be mounted as close to the fuel tank as possible, and often below the tank. This allows the pump to be gravity-fed, reducing the effort it takes to draw fuel from the tank and improving its lifespan and efficiency. Ensure the pump is securely mounted, away from extreme heat sources, and protected from road debris.

Q7: What are common installation mistakes to avoid when installing an inline fuel pump for a turbo LS?

Common mistakes include:
– Undersizing fuel lines: Use appropriately sized lines (e.g., -6AN or -8AN) for your pump’s flow and engine’s demands.
– Poor wiring: Ensure proper gauge wiring is used, along with a relay, to provide consistent voltage to the pump. Inadequate wiring can cause voltage drop and reduce pump performance.
– No pre-filter: Always run a pre-filter (typically 100-micron) before the inline pump to protect it from large debris from the tank.
– Improper mounting: Mounting the pump too high or far from the tank can lead to cavitation and premature wear.
– Incorrect regulator setup: Not using a boost-referenced regulator for a turbo application, or setting the base pressure incorrectly.