Best Fuel Pumps for Holley Sniper EFI Systems

When I first dove into converting my classic muscle car to a Holley Sniper EFI system, I quickly realized that the fuel pump wasn’t just an afterthought – it was absolutely critical. You can have the best EFI system on the planet, but if your fuel pump can’t deliver the consistent, high-pressure fuel it needs, you’re going to have a bad time. I’ve spent my fair share of hours researching, installing, and fine-tuning these systems, and one of the biggest questions that always comes up is: “Which fuel pump should I get for my Holley Sniper EFI?” It’s not just about horsepower; it’s about reliability, ease of installation, and matching the right pump to your specific setup. In this guide, I’ll walk you through some of the best fuel pump options from Holley designed specifically for your Sniper EFI system, sharing insights from hands-on experience to help you make the smartest choice for your ride.

IMAGE	PRODUCT NAME	AMAZON LINK
	Holley Sniper EFI 19-340 340 LPH E85 In-Tank Electric…	View on Amazon
	Holley Sniper EFI 19-380 Sniper Fuel Cell EFI Pump Module…	View on Amazon
	Holley Sniper EFI 12-329 Fuel Pump Module – 350LPH	View on Amazon
	Holley Sniper EFI 19-385 Sniper Fuel Cell EFI Pump Module…	View on Amazon
	Holley Sniper EFI 12-317 In-Tank EFI Fuel Pump Module 255…	View on Amazon

Holley Sniper EFI 19-340 340 LPH E85 In-Tank Electric Fuel Pump

This 340 LPH (liters per hour) in-tank pump from Holley is a fantastic all-rounder for many Sniper EFI setups, especially if you’re looking for a clean, quiet, and reliable solution. What makes it stand out is its E85 compatibility, which is a huge plus for those running alternative fuels or planning future upgrades. I’ve found that in-tank pumps generally run cooler and quieter than external units, and this one is no exception. It’s designed to fit seamlessly into existing hanger assemblies in your fuel tank, often without complex modifications, making the EFI conversion much smoother. The complete kit includes everything you need, ensuring you’re not scrambling for extra parts mid-installation, and its robust inlet filter provides excellent filtration, protecting your expensive EFI components.

• 340 LPH flow rate, suitable for a wide range of Sniper EFI applications
• E85 compatible, offering fuel flexibility for performance builds
• Designed for in-tank use only, promoting cooler and quieter operation
• Compact size allows for fitment in many existing hanger assemblies
• Comes as a complete kit with all necessary drop parts and accessories
• Includes an improved inlet filter for superior filtration and durability

Pros:
– Excellent flow rate for most street and mild performance Sniper EFI systems
– E85 compatibility adds future-proofing and flexibility
– In-tank design is generally quieter and runs cooler than external pumps
– Complete kit simplifies installation
– Improved inlet filter enhances system longevity

Cons:
– Requires dropping the fuel tank for installation, which can be time-consuming
– Not suitable for extreme high-horsepower applications requiring more than 340 LPH
– Only for in-tank applications, not versatile for fuel cell setups

Best for: Street performance vehicles, hot rods, and cruisers running Holley Sniper EFI that require an in-tank, E85-compatible fuel pump with a good balance of flow and reliability.

User feedback summary: Owners frequently praise this pump for its quiet operation and consistent fuel delivery. Many appreciate the complete kit, which makes the installation process much less frustrating. The E85 compatibility is often highlighted as a significant bonus for their builds.

Holley Sniper EFI 19-380 Sniper Fuel Cell EFI Pump Module

If you’re working with a fuel cell, this Holley Sniper EFI pump module is designed to make your EFI conversion incredibly straightforward. It’s a lifesaver for anyone wanting to update their existing 12-bolt flange fuel cell to EFI without the hassle of custom fabrication. I particularly like the diecast aluminum top flange housing, which feels robust and includes all the necessary ports – a 6AN inlet, 6AN outlet, and even a fuel filler cap. The genius here is its fully adjustable pump depth, accommodating popular fuel cell sizes from 7.5 to 12 inches deep. This adjustability takes a lot of guesswork out of the installation, ensuring proper fuel pickup regardless of your cell’s dimensions. It’s available with a single 340 LPH pump, supporting both return and returnless system designs, giving you flexibility in your fuel system architecture.

• Specifically designed for fuel cells with a 12-bolt flange
• Robust diecast aluminum top flange housing with integrated ports and filler cap
• Adjustable pump depth (7.5”-12”) for universal fitment in popular fuel cells
• Features a single 340 LPH fuel pump
• Supports both return and returnless system designs
• Simplifies the conversion of a fuel cell to EFI

Pros:
– Solves the common problem of converting fuel cells to EFI with ease
– Adjustable depth makes it highly versatile for various fuel cell sizes
– Integrated ports and filler cap simplify plumbing and setup
– Offers flexibility with return and returnless system options
– Robust construction for durability

Cons:
– Only compatible with 12-bolt flange fuel cells
– The 340 LPH pump might not be sufficient for extreme high-horsepower applications
– Requires owning a fuel cell, not suitable for stock tank conversions

Best for: Enthusiasts converting a race car, off-road vehicle, or any custom build utilizing a 12-bolt flange fuel cell to a Holley Sniper EFI system.

User feedback summary: Users rave about how easy this module makes a fuel cell EFI conversion. The adjustable depth is a frequently praised feature, as is the integrated design that cleans up the engine bay and simplifies plumbing. Reliability and consistent performance are commonly reported.

Holley Sniper EFI 12-329 Fuel Pump Module – 350LPH

For those needing a bit more fuel flow for their Holley Sniper EFI, the 12-329 in-tank fuel pump module steps up to the plate with 350 LPH, capable of supporting EFI engines producing up to an impressive 750 horsepower. What truly sets this module apart, however, is its incredible ease of integration. It’s designed as a direct replacement for many applications, meaning it can often drop right into your factory fuel tank without extensive modifications, making the conversion from a carbureted setup to EFI feel like a breeze. A significant feature is the pre-calibrated fuel-level sending unit that’s designed to work with your factory fuel gauge. This solves one of the most annoying issues of EFI conversions – getting your old fuel gauge to read correctly with a new pump system. It’s a comprehensive solution for higher horsepower street cars.

• High-pressure, 350 LPH flow rate
• Supports EFI engines up to 750 horsepower
• Designed for direct replacement in many factory fuel tanks
• Includes a pre-calibrated fuel-level sending unit compatible with factory gauges
• Specifically engineered to solve common carb-to-EFI conversion issues
• Offers a complete in-tank solution for higher performance needs

Pros:
– Higher flow rate for more demanding EFI applications up to 750 HP
– Direct replacement design simplifies installation considerably
– Integrated, pre-calibrated fuel-level sender eliminates a common conversion headache
– Provides a clean, in-tank solution that runs quietly and efficiently

Cons:
– Requires tank removal for installation, similar to other in-tank pumps
– Specific to certain vehicle applications for direct replacement, check compatibility
– May be overkill for very mild builds, but offers headroom

Best for: Performance vehicle owners converting to Holley Sniper EFI who need more fuel flow for engines up to 750 HP and desire a direct-fit, in-tank solution that maintains factory fuel gauge functionality.

User feedback summary: Many users highlight the seamless integration and the convenience of the pre-calibrated fuel sending unit. The increase in horsepower support is a major draw, and the pump is consistently described as robust and reliable, providing steady fuel pressure even under demanding conditions.

Holley Sniper EFI 19-385 Sniper Fuel Cell EFI Pump Module

Much like its counterpart, the 19-380, the Holley Sniper EFI 19-385 pump module is another excellent choice for anyone looking to seamlessly upgrade their fuel cell to EFI. It’s engineered to drop right into your existing 12-bolt flange fuel cell, removing much of the headache associated with custom fuel system fabrication. The diecast aluminum top flange housing is a premium touch, integrating both the 6AN inlet and 6AN outlet ports, along with a convenient fuel filler cap, creating a very clean and functional setup. Its key feature is the fully adjustable pump depth, which offers incredible versatility, fitting most popular fuel cell sizes ranging from 7.5 to 12 inches deep. This means you can achieve optimal fuel pickup regardless of your cell’s internal dimensions. This module also comes with a single 340 LPH fuel pump, supporting both return and returnless EFI system designs, giving you ample choice for your fuel system architecture.

• Specifically engineered for fuel cell EFI conversions, fitting 12-bolt flanges
• Features a durable diecast aluminum top flange housing
• Includes integrated 6AN inlet/outlet ports and a fuel filler cap
• Fully adjustable pump depth (7.5″-12″) ensures fitment in a wide range of fuel cells
• Equipped with a single 340 LPH fuel pump
• Supports both return and returnless EFI system configurations

Pros:
– Simplifies the process of converting a fuel cell to EFI significantly
– Adjustable pump depth provides broad compatibility across various fuel cell designs
– Integrated design with all necessary ports makes for a clean installation
– Offers flexibility for choosing between return or returnless fuel systems
– High-quality construction for long-term reliability

Cons:
– Limited to fuel cell applications with a 12-bolt flange
– Flow rate of 340 LPH might not be sufficient for very high-horsepower builds (750+ HP)
– Requires existing fuel cell for installation, not for stock tanks

Best for: Custom vehicle builders, race car enthusiasts, or anyone with a 12-bolt flange fuel cell needing a robust, adjustable, and easy-to-install EFI fuel pump solution for their Holley Sniper EFI system.

User feedback summary: Users appreciate the straightforward installation process and the module’s ability to perfectly adapt to various fuel cell depths. The integrated filler cap and ports are consistently praised for making a clean and professional setup. Performance is reported as strong and consistent, providing reliable fuel delivery.

Holley Sniper EFI 12-317 In-Tank EFI Fuel Pump Module 255 LPH

For those running a more moderately powered engine with their Holley Sniper EFI, the 12-317 in-tank module is an excellent and cost-effective choice. It flows 255 LPH, which is perfectly capable of supporting engines up to 550 horsepower. What makes this unit incredibly appealing for many street car applications is its internally regulated design to 58 PSI. This feature simplifies your fuel system by eliminating the need for an external fuel pressure regulator and return line for many Sniper EFI systems, reducing complexity and potential points of failure. But the real game-changer here is the included HydraMat patent-pending fuel reservoir system. This innovative technology significantly reduces fuel starvation issues during aggressive driving, cornering, or when the fuel level is low, by ensuring the pump always has access to fuel.

• Supports up to 550 horsepower (HP)
• Flows 255 liters per hour (LPH), ideal for moderate performance
• Internally regulated to 58 PSI, simplifying fuel system plumbing
• Includes the HydraMat patent-pending fuel reservoir system to prevent fuel starvation
• Designed for in-tank use, promoting quiet and cool operation
• An excellent option for street cars seeking reliable EFI conversion

Pros:
– Internally regulated pressure simplifies the fuel system (no external regulator needed for many setups)
– HydraMat technology provides superior anti-fuel starvation benefits
– Good flow rate for up to 550 HP, covering many street and mild performance builds
– In-tank design is quiet and runs efficiently
– Cost-effective solution for reliable EFI operation

Cons:
– Lower flow rate might not be sufficient for very high-horsepower builds (over 550 HP)
– Requires tank removal for installation
– Not E85 compatible

Best for: Street cars, daily drivers, and mild performance builds (under 550 HP) converting to Holley Sniper EFI, where simplicity, reliability, and fuel starvation prevention are top priorities.

User feedback summary: Owners consistently praise the HydraMat’s effectiveness in preventing fuel slosh and starvation, especially in vehicles that see spirited driving. The internally regulated design is frequently mentioned as a major convenience, simplifying installation and reducing parts count. It’s considered a very reliable option for its horsepower range.

Helpful Comparison Insights

When choosing the best fuel pumps for Holley Sniper EFI systems, it really boils down to your specific application, horsepower goals, and existing fuel system setup. Let’s break down some key differences.

For in-tank solutions, we’ve looked at three strong contenders. The Holley Sniper EFI 19-340 is a fantastic choice for most street performance applications. Its 340 LPH flow rate is ample for many setups, and its E85 compatibility makes it stand out for those considering alternative fuels. It’s a solid, quiet performer. Stepping up in flow, the Holley Sniper EFI 12-329 offers a significant jump to 350 LPH, supporting up to 750 horsepower. This is ideal for more aggressive builds. What’s truly invaluable about the 12-329 is its direct-replacement design and pre-calibrated fuel-level sending unit, which can save a lot of headaches during installation and ensure your factory gauge still works. Finally, for more moderate builds up to 550 horsepower, the Holley Sniper EFI 12-317 with its 255 LPH flow is a great option. Its internally regulated pressure simplifies plumbing by often eliminating the need for an external regulator and return line. The HydraMat system is also a major advantage here, effectively preventing fuel starvation during hard cornering or low fuel levels, a common issue for many.

If your vehicle uses a fuel cell, the Holley Sniper EFI 19-380 and 19-385 Sniper Fuel Cell EFI Pump Modules are your go-to options. Both are designed to easily update a 12-bolt flange fuel cell to EFI. They both come with a 340 LPH pump and feature adjustable pump depths to fit most common fuel cell sizes. The key takeaway for these modules is their integrated design, providing a clean setup with built-in ports and a fuel filler cap. They are essentially similar robust solutions for fuel cell conversions, offering great versatility and simplifying what could otherwise be a complex task.

Consider your horsepower target first. If you’re under 550 HP, the 255 LPH 12-317 is perfectly capable and offers unique benefits like the HydraMat. For 550-700 HP, the 340 LPH pumps (19-340, 19-380, 19-385) are generally sufficient. If you’re pushing past 700 HP towards 750 HP, the 350 LPH 12-329 provides that extra headroom.

Also, decide on your fuel type. If E85 is in your plans, the 19-340 is purpose-built for it. For standard gasoline, all options will perform well. Finally, ease of installation and system complexity are crucial. The 12-317’s internally regulated pressure simplifies plumbing, while the 12-329’s direct-fit and integrated sender streamline the overall conversion for specific applications. For fuel cell users, the 19-380 and 19-385 are tailor-made to reduce installation hurdles.

Final Verdict

Choosing the right fuel pump for your Holley Sniper EFI system doesn’t have to be a shot in the dark. For the vast majority of street rods, muscle cars, and daily drivers looking for a reliable in-tank solution with E85 compatibility, the Holley Sniper EFI 19-340 340 LPH stands out as an exceptional, well-rounded performer. It offers a great balance of flow, quiet operation, and installation convenience with its complete kit.

If you’re building a more serious street or track car and need to support up to 750 horsepower with a seamless in-tank factory fit, the Holley Sniper EFI 12-329 350LPH Fuel Pump Module is your champion, especially with its integrated fuel-level sending unit. This one truly solves multiple conversion headaches in one go.

For those running a fuel cell and seeking the easiest path to EFI, either the Holley Sniper EFI 19-380 or 19-385 Sniper Fuel Cell EFI Pump Modules are the clear winners. Their adjustable depth and integrated design make fuel cell conversions shockingly straightforward.

And finally, for an excellent, budget-friendly in-tank option for builds up to 550 HP that prioritizes simplicity and bulletproof fuel delivery under all conditions, the Holley Sniper EFI 12-317 In-Tank EFI Fuel Pump Module 255 LPH with HydraMat is practically unbeatable. The HydraMat alone makes it a serious contender for any spirited driver.

Ultimately, by considering your vehicle’s current setup, future power goals, and your desired level of installation complexity, you can confidently select the perfect Holley fuel pump to complement your Sniper EFI system and keep your engine fed reliably for years to come.

Comprehensive FAQ Section

Q1: Why do I need a specific fuel pump for a Holley Sniper EFI system?
A: Carbureted engines typically use low-pressure (5-7 PSI) mechanical fuel pumps. Holley Sniper EFI systems, like most EFI systems, require much higher fuel pressure (typically 58 PSI) and a significantly higher volume of fuel to operate correctly. Using an old, low-pressure pump will lead to poor performance, sputtering, and potentially damage to your EFI components. A dedicated Holley Sniper EFI fuel pump ensures the correct pressure and flow.

Q2: What does LPH mean, and how much do I need for my Holley Sniper EFI?
A: LPH stands for “Liters Per Hour” and indicates the volume of fuel the pump can flow. The amount you need depends on your engine’s horsepower. As a general guideline, a 255 LPH pump can support around 550 HP, a 340-350 LPH pump supports up to 700-750 HP, and higher flow rates are needed for even more extreme builds. It’s always best to choose a pump with a little more capacity than you think you’ll need to provide headroom.

Q3: Is an in-tank or external fuel pump better for a Holley Sniper EFI system?
A: In-tank fuel pumps are generally preferred for Holley Sniper EFI fuel pump installations because they run cooler (being submerged in fuel), are typically quieter, and are less prone to cavitation (vapor lock). External pumps can be easier to install without dropping the fuel tank, but they often require more thought regarding mounting, cooling, and noise reduction. Holley offers excellent options for both configurations.

Q4: Do I need a fuel return line with a Holley Sniper EFI system?
A: Most Holley Sniper EFI systems are designed to be “return style,” meaning they require a return line back to the fuel tank. This helps regulate fuel pressure and circulates cool fuel, preventing fuel heating issues. However, some specific Holley Sniper EFI fuel pump modules, like the 12-317, feature internal regulation that can simplify the system and, in some cases, eliminate the need for an external regulator and return line, depending on your setup. Always check the specific Sniper EFI system’s requirements.

Q5: What is a HydraMat, and why is it important for a Holley Sniper EFI fuel pump?
A: The HydraMat is a patent-pending fuel reservoir system designed by Holley. It’s an innovative filter sock that prevents fuel starvation. It utilizes an internal baffling system and a large, multi-layered filtration surface to essentially “trap” fuel around the pump pickup, ensuring a constant supply even during hard cornering, acceleration, braking, or when the fuel level is critically low. This significantly improves the reliability and performance of your Holley Sniper EFI fuel pump system, especially in performance applications.

Q6: Can I use E85 fuel with any Holley Sniper EFI fuel pump?
A: No, not all Holley Sniper EFI fuel pump options are compatible with E85 fuel. E85 is highly corrosive to certain materials, so a fuel pump must be specifically designed and constructed with E85-compatible components. The Holley Sniper EFI 19-340 340 LPH In-Tank Electric Fuel Pump, for example, is explicitly E85 compatible, but always double-check the product specifications if you plan to run E85.

Q7: How important is a fuel pressure regulator for my Holley Sniper EFI setup?
A: A consistent 58 PSI of fuel pressure is crucial for your Holley Sniper EFI system to function correctly. While some fuel pumps, like the 12-317, have internal regulators, most Sniper EFI setups will require an external fuel pressure regulator to maintain this precise pressure. Without the correct and stable fuel pressure, your engine can run too lean or too rich, leading to poor performance, reduced fuel economy, and potential engine damage.