Spool Performance AMG G63 / G550 [M177] Spool FX-350 Upgraded High Pressure Pump Kit

Introducing the Spool Performance FX-350, a revolutionary high-pressure fuel pump that sets a new benchmark in fuel delivery for high-performance engines. Designed as the next evolution of the FX200, the FX-350 outperforms its predecessor with significantly higher fuel pressure and flow capacity, ensuring optimal performance for the Mercedes M177 engine platform.

What is the FX-350?

The Spool FX-350 is a high-pressure fuel pump engineered to deliver fuel at an impressive 35MPa (compared to the FX200's 25MPa). This increase in pressure results in a higher flow rate through the injectors, ensuring more fuel is available for combustion in high-performance applications. The FX-350 allows injectors to flow 40% more fuel before reaching injection window limitations, making it ideal for engines running bigger turbos or higher ethanol concentrations.

• Enhanced Fuel Atomization: Higher pressure from the FX-350 improves fuel atomization, ensuring a more complete burn for greater power output, improved fuel economy, and reduced emissions.

• Optimized for High Performance: The FX-350 offers unmatched efficiency and is essential for enthusiasts seeking maximum output from their high-performance engine.

Why Do You Need the FX-350?

The stock high-pressure fuel pump on the M177 engines struggles to meet the fuel demands of tuned and high-output engines. The FX-350 increases the fuel flow capacity by 90%, raising the platform’s fueling limits and supporting larger turbos and higher ethanol blends.

What’s Included in the Kit?

• 2 x FX-350 High-Pressure Fuel Pumps
• 1 x Ethanol Content Monitor Kit (optional) with mobile app integration
• 1 x Bosch Spec 10-Micron High-Flow Fuel Filter
• Upgraded Fuel Lines and all necessary installation hardware

Additional Components:

• Spool 10-Micron Filter Unit: Offering top-tier filtration without noticeable pressure drop, this filter protects your high-pressure pump and injectors from debris.

• Spool Ethanol Content Monitor: Featuring a digital readout of ethanol content and fuel temperature, this monitor syncs with the Spool Ethanol Content Analyzer App via BLE 4.0 technology. The included fuel lines are braided steel PTFE core, 100% compatible with E85 fuel.

Are Tune Changes Required?

Yes, calibration changes are necessary when installing the FX-350 pumps. It is crucial to apply these changes before starting the vehicle to prevent potential damage and warranty voiding. Spool Performance provides calibration details and can assist in connecting you with tuners experienced with the FX-350. Proper tuning is essential to unlock the full potential of the upgraded pump system for your specific setup and conditions.

Low-Pressure Fuel Pump Upgrade:

Adequate low-pressure fueling is essential for the durability and proper functioning of high-pressure pumps in a Direct Injection (DI) system. Inadequate low-pressure fueling can lead to damage to the pump piston and bore, potentially voiding warranties. Proper planning of your fuel system build with appropriate low-pressure upgrades is strongly advised.

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.