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

Introducing the Spool FX-350 Upgraded High Pressure Fuel Pump System for the Mercedes-AMG G63/G550 [M177], a high-performance fuel pump upgrade designed to push the limits of your M177 engine. The FX-350 surpasses its predecessor, the FX-200, delivering 35Mpa of pressure—substantially higher than the 25Mpa of the FX-200. This increase in pressure leads to a significant boost in fuel flow and combustion efficiency, ensuring your engine can handle larger turbos, higher ethanol concentrations, and extreme performance builds.

Key Features:

• 35Mpa Pressure & 90% More Flow:
  The FX-350 is engineered to deliver fuel at an impressive 35Mpa, 90% more flow compared to the FX-200. This results in better fueling for high-performance setups, allowing for bigger turbos and higher ethanol concentrations without hitting injector flow limits.

• Improved Fuel Atomization:
  Higher pressure leads to better fuel atomization, meaning finer fuel droplets are injected into the combustion chamber. This ensures more efficient combustion, leading to increased power, improved fuel economy, and reduced emissions—ideal for performance builds seeking maximum efficiency.

• Superior Filtration:
  The Bosch spec 10-micron high-flow fuel filter included in the kit provides superior filtration without noticeable pressure drop in the low-side fuel system. The 10-micron filter unit is essential for keeping debris away from the high-pressure pump and injectors, ensuring long-term durability and optimal performance.

• Plug-and-Play Installation:
  The FX-350 kit is fully plug-and-play, designed for a seamless fit with the M177 engine. The kit includes all necessary hardware for installation, ensuring you can upgrade your fuel system quickly and easily.

• Complete Kit Includes:

  • 2 x FX-350 upgraded high-pressure fuel pumps

  • 1 x Ethanol Content Monitor (optional) with mobile app for real-time monitoring

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

  • Upgraded fuel lines, braided steel PTFE core, 100% E85 compatible

  • Comprehensive installation hardware for a hassle-free setup

• Ethanol Content Monitor (Optional):
  The Ethanol Content Monitor (ECA) kit offers a digital readout of in-tank ethanol content and fuel temperature. With BLE 4.0 technology, it connects to mobile devices for real-time monitoring, helping you track your fuel system’s performance.

Why You Need It:

The stock HPFP on the M177 engine is often too limited when tuning or raising the engine’s output. The FX-350 upgrades the fuel system, delivering 40% more fuel flow before hitting the limits of your injectors. This makes the FX-350 the perfect upgrade for anyone running bigger turbos, higher ethanol blends, or aiming for extreme power.

Tune Requirements:

Custom tuning is required when installing the FX-350. Changes to the car’s calibration must be made before starting the engine with the upgraded pumps to avoid potential damage. Spool Performance can provide calibration details to your existing tuner or assist you in finding tuners with experience working with the FX-350 setup.

Low-Pressure Fueling:

Low-pressure fueling is critical for the durability and functionality of your high-pressure pumps and injectors. Inadequate low-pressure fueling can lead to damage to the fuel pump piston and bore. When upgrading your fuel system, ensure that proper low-pressure fueling is implemented to avoid warranty voids and ensure long-term reliability.

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.