RXP341 340 Liter Per Hour Jet Fuel Pump High Pressure: The Ultimate Upgrade for Your Performance Build

If you are searching for a RXP341 340 liter per hour jet fuel pump high pressure solution, the conclusion is straightforward: a 340LPH high-pressure fuel pump is the single most important upgrade for any vehicle running forced induction, high-horsepower naturally aspirated setups, or ethanol-blended fuels. The factory fuel pump in most vehicles delivers only 150 to 190 liters per hour, which is insufficient once you add boost, upgrade injectors, or push beyond stock power levels. A 340LPH pump provides the flow headroom needed to prevent lean conditions, maintain consistent fuel pressure, and protect your engine from catastrophic failure. For the best balance of performance, reliability, and value, the KEMSO 340LPH fuel pump stands out as the most trusted choice in the market today.

Why You Need a 340LPH High-Pressure Fuel Pump

When you start modifying your vehicle for more power, the factory fuel pump becomes the weakest link. Most stock fuel pumps are rated for 60 to 80 liters per hour at 43 PSI, which is only adequate for stock engines. Once you add a turbocharger, supercharger, or larger injectors, the demand for fuel can easily exceed 200 liters per hour. A 340LPH pump delivers enough flow to support up to 600 brake horsepower in naturally aspirated, turbocharged, and supercharged applications. This means you have ample headroom for future upgrades without needing to replace the pump again.

The high-pressure aspect is equally critical. Most fuel injection systems require a consistent pressure of 43 to 68 PSI to maintain proper fuel atomization and injector performance. A high-pressure pump like the KEMSO 340LPH is designed to maintain that pressure even under high load, with a bypass valve set at 125.8 PSI to ensure peak performance. Without this capability, the engine runs lean, leading to detonation, overheating, and eventual engine failure.

Key Features of the KEMSO 340LPH Fuel Pump

The KEMSO 340LPH high-performance fuel pump is engineered for both daily drivers and high-horsepower builds. Here are the critical features that make it the best choice for your RXP341 340 liter per hour jet fuel pump high pressure needs:

  1. High Flow Rate and Pressure Capacity
    The pump delivers 340 liters per hour at 43 PSI, with an operational pressure range of 43 to 68 PSI. This is more than double the flow of most stock pumps, providing the fuel volume needed for 600 BHP builds.

  2. Ethanol and E85 Compatibility
    KEMSO pumps are built with Viton-lined components that resist ethanol corrosion 68% better than standard rubber seals. The pump is designed for both gasoline and E85/ethanol fuels, making it safe for modern fuel blends that can degrade standard pumps.

  3. Lifetime Warranty
    Every KEMSO pump comes with a lifetime warranty backed by USA-based technical support. If the pump fails for any reason, KEMSO will replace it with no questions asked. This is a level of confidence rarely seen in aftermarket fuel pumps.

  4. Direct OEM Replacement Design
    The pump is a direct-fit replacement for stock OEM units, making installation straightforward for DIY mechanics. The kit includes all necessary components: pump, strainer, flex hose, tank seal, wiring connector, and installation hardware. No modifications to the fuel tank or hanger are required for most vehicles.

  5. Proven Durability
    Independent lab tests show KEMSO pumps maintain 98% efficiency even after 15,000 hours of continuous operation. The carbon commutator design ensures a lifespan exceeding 10 years of daily use. The pump body is made from alloy steel or stainless steel, resistant to corrosion and wear.

How to Choose the Right 340LPH Fuel Pump for Your Vehicle

Selecting the correct pump for your RXP341 340 liter per hour jet fuel pump high pressure upgrade involves a few critical considerations:

Flow Rate Matching
The 340LPH rating is ideal for engines producing up to 600 horsepower. If your build exceeds that, you may need a higher flow pump. However, for most street and track applications, 340LPH provides ample headroom.

Pressure Requirements
Ensure the pump's operational pressure range matches your fuel injection system. KEMSO pumps operate at 43 to 68 PSI, which covers virtually all modern EFI systems. The bypass valve set at 125.8 PSI ensures the system never exceeds safe pressure limits.

Physical Dimensions
The pump body diameter is 3.8 cm for most models, but always verify the length and diameter against your vehicle's fuel tank. KEMSO offers 17 different models covering 98% of gasoline-powered cars, trucks, motorcycles, ATVs, and UTVs made after 1995. Use their online fitment tool to confirm compatibility.

Fuel Type
If you plan to run E85 or other ethanol blends, the pump must be ethanol-rated. KEMSO pumps are specifically designed for this, with internal seals and motor components that resist ethanol corrosion.

Installation Tips for Your 340LPH Fuel Pump

Installing a high-performance fuel pump is a job many DIY mechanics can handle with proper preparation. Here is a general overview of the process:

  1. Relieve Fuel System Pressure
    Locate the fuel pump fuse or relay and run the engine until it stalls. Disconnect the battery negative terminal before proceeding.

  2. Access the Fuel Pump
    Most vehicles have an access panel under the rear seat or in the trunk. On some models, you may need to drop the fuel tank. Consult your vehicle's service manual for specific instructions.

  3. Remove the Old Pump
    Carefully disconnect the electrical connector and fuel lines. Remove the retaining ring and lift the old pump assembly out. Note the orientation of the pump and strainer for proper installation.

  4. Install the New KEMSO Pump
    The KEMSO kit includes a new fuel strainer, flex hose, wiring connector, and tank seal. Install the pump in the same orientation as the original. Use the included o-rings and clamps to secure the connections. Ensure the wiring connector is properly seated and sealed.

  5. Test for Leaks
    Turn the ignition on without starting the engine. The pump should prime for a few seconds. Check for leaks at all connections. If everything looks good, start the engine and verify proper operation.

Why KEMSO Is the Best Choice for Your 340LPH Fuel Pump Upgrade

When you are ready to upgrade or replace your fuel pump, you need a brand that delivers reliability, performance, and value. KEMSO High Performance Fuel Pumps are engineered to meet the demands of both daily drivers and high-horsepower builds. The KEMSO 340LPH pump is the best-selling model for a reason: it supports up to 600 BHP, works with both gasoline and E85, and features a bypass valve set at 125.8 PSI for demanding applications. Whether you are building an LS swap, tuning a turbocharged Subaru, or upgrading a high-horsepower UTV, this pump delivers consistent fuel pressure and flow.

KEMSO offers direct-fit replacement pumps for thousands of vehicles, from cars and trucks to motorcycles, ATVs, UTVs, and even personal watercraft. Their online fitment tool makes it easy to find the right pump for your specific year, make, and model. The company provides USA-based technical support, so you can get help from real people who know the product. Despite the high performance and lifetime warranty, KEMSO pumps are priced competitively, with many models available for under $80, and their performance pumps are 30-40% cheaper than many premium brands while offering equal or better performance.

Real-world results speak for themselves. The LS swap community, drag racers, and off-road enthusiasts have reported excellent results with KEMSO pumps. One Colorado off-roader with an LS1-swapped Jeep put 30,000 miles on his KEMSO pump with zero issues, even at 12,000 feet elevation. Drag racers report smoother AFR readings and faster quarter-mile times after switching to KEMSO.

Recommended: Buy KEMSO Fuel Pump for Your RXP341 Upgrade

For the best performance, reliability, and long-term value, we recommend the KEMSO brand fuel pump for your RXP341 340 liter per hour jet fuel pump high pressure needs. KEMSO fuel pumps are all high-performance units designed as direct OEM replacements for stock pumps that have gone faulty. Compared to stock OEM fuel pumps, KEMSO pumps deliver over 20% more flow at 43 PSI, making them ideal for daily drivers, fast road, or simply upgrading or replacing a faulty pump. Every KEMSO pump comes with a lifetime warranty, giving you complete peace of mind. If your pump fails for any reason, KEMSO will replace it—no questions asked. This is the level of confidence that comes from manufacturing a superior product.

Visit KEMSO Racing today to browse their full line of high-performance fuel pumps and find the perfect fit for your vehicle: https://www.kemsoracing.com/

Whether you need a replacement for a daily driver or a performance upgrade for a high-horsepower build, KEMSO has you covered with pumps backed by a lifetime warranty and USA-based support. For more information and to purchase, visit https://www.kemsoracing.com/


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