Spool Performance FX-350 Upgraded High Pressure Fuel Pump System | [M276]

The Spool FX-350 is the ultimate high-pressure fuel pump upgrade for Mercedes M276 engines. Building on the foundation of the FX-200, the FX-350 delivers superior performance and efficiency, engineered to support higher boost levels, larger turbos, and ethanol-heavy fuel blends. With a significant increase in both pressure and flow, the FX-350 offers the ideal fueling solution for high-performance applications that demand more power and reliability.

Key Features of the FX-350 Fuel Pump System:

Increased Pressure & Flow
The FX-350 operates at an impressive 35MPa, compared to the FX-200’s 25MPa, providing a substantial boost in pressure and fuel flow. This increase translates to 40% more fuel flow through the injectors before hitting the max injection window, ensuring your engine receives enough fuel to meet the demands of higher-output setups.

Improved Fuel Atomization
Higher pressure helps atomize fuel better, meaning the fuel droplets are smaller and more evenly mixed with air in the combustion chamber. This results in a more complete combustion, improving both power output and fuel efficiency, while simultaneously reducing emissions.

E85 Compatibility & Plug-and-Play Installation
The FX-350 is E85 compatible and features a plug-and-play installation—no cutting or splicing required. The kit is designed to integrate seamlessly with your existing system, allowing you to boost performance without hassle. Whether you are running higher ethanol concentrations or larger turbochargers, the FX-350 will support your upgrades with ease.

High-Flow Filtration & Protection
Included with the FX-350 kit is a Bosch spec 10-micron high-flow fuel filter, ensuring your fuel system is protected from contaminants without a noticeable pressure drop. This filter unit is crucial for the longevity of the high-pressure pump and injectors.

Spool Ethanol Content Monitor (Optional)
Monitor your ethanol content and fuel temperature with the optional Spool Ethanol Content Monitor Kit. This kit uses Bluetooth 4.0 technology and a dedicated mobile app to provide real-time data on your ethanol blend and fuel temperature, helping you optimize your fueling setup.

Why You Need the FX-350:

The stock high-pressure fuel pump (HPFP) in the Mercedes M276 engines is limited in its fueling capacity, especially when tuning for higher performance or adding larger turbos. The FX-350 provides 90% more flow compared to the stock pump, helping you overcome fueling limitations, support larger turbos, and run higher ethanol blends for enhanced power.

What Does the Kit Include?

• 1x FX-350 upgraded high-pressure fuel pump

• 1 x Bosch spec 10-micron high-flow fuel filter

• Upgraded fuel lines (black nylon-coated, braided steel PTFE core, 100% E85 compatible)

• All necessary installation hardware

• Spool 10-micron filter unit for maximum filtration efficiency

• Spool Ethanol Content Monitor Kit (optional) for monitoring ethanol content and fuel temperature via mobile app

Tune Changes & Calibration:

As with any high-performance upgrade, calibration changes are necessary to ensure the FX-350 fuel pumps deliver optimal performance. These adjustments should be made before starting the car with the upgraded pumps installed. Spool Performance can provide calibration details to your existing tuner or help connect you with tuners experienced with this system.

Low-Pressure Fuel Pump Considerations:

Proper low-pressure fueling is essential for maintaining the longevity and reliability of the high-pressure pump and injectors. Inadequate low-pressure fueling can result in pump piston and bore damage, potentially voiding warranties. Ensure that your fuel system is adequately upgraded with the necessary low-pressure fuel components.

Benefits of the FX-350 Fuel Pump System:

• 90% increased flow over stock for handling larger turbos and higher ethanol blends

• Operates at 35MPa pressure, delivering 40% more flow before maxing out the injectors

• E85 compatible and plug-and-play installation

• Bosch 10-micron fuel filter for superior filtration without pressure loss

• Spool Ethanol Content Monitor Kit (optional) for real-time fuel monitoring via Bluetooth

• Lifetime warranty for added peace of mind

Maximize Your Engine’s Potential with the Spool FX-350 High-Pressure Fuel Pump System—perfect for Mercedes M276 owners looking to enhance their vehicle's fueling capacity and performance.

Note: 'New' merchandise may be returned for exchange or refund within 15 days from the date of shipment. 'New' merchandise must be unused and free from installation or mounting damage. Installation or modification of parts waives your right to returns, refunds, or exchanges.