Spool FX-200 HPFP Kit AMG [M177]

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This condition applies to the following product categories:

• Suspension
• Engine Tuning
• Engine Parts
• Exhaust Systems
• Fueling
• Turbochargers/superchargers
• Drivetrain
• ECE-approved Downpipes

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Spool FX-200 HPFP Kit | AMG M177

The Spool Performance FX-200 is a high-pressure fuel pump (HPFP) performance upgrade for Mercedes-AMG M177 engines. This solution is designed for high-power V8 biturbo setups where the standard fuel system is insufficient to support increasing power targets.

What is the FX-200?

The FX-200 is an upgraded high-pressure pump with a larger cylinder diameter than stock. This allows for approximately +80% more fuel flow compared to the original pump.

• Approximately +80% flow compared to stock
• Full E85 compatibility
• Plug & Play installation with no cutting or wiring changes
• Capable of running operating pressures up to approx. 240 bar
• Improves injector flow and shortens injection duration

Additional capacity enables:

• Higher ethanol blends
• Larger turbochargers
• Significantly higher power levels

Why is an upgrade necessary?

The M177 engine's standard HPFP is a clear limitation in tuning:

• Insufficient fuel supply for high power levels
• Limited use of ethanol blends

The FX-200:

• Significantly increases fuel system capacity
• Expands the platform's fuel limits
• Enables more powerful and safer tuning

Package contents

• 2 x FX-200 high-pressure fuel pumps
• Upgraded fuel lines + installation hardware
• Bosch 10 micron high-flow fuel filter
• Ethanol content monitoring system (optional, with mobile app)

Spool 10-micron filter

• Top-tier filtration without significant pressure drop
• Protects HPFP and injectors from contaminants
• Designed for the Mercedes platform

Spool Ethanol Content Monitor (optional)

• Real-time ethanol content and fuel temperature display
• Mobile app with BLE 4.0 connectivity
• Allows for precise control of the fuel mixture
• Full E85 compatibility for fuel lines

Software requirements

Operating the pump requires software modifications:

• Calibration must be performed before use
• Operating without calibration may cause damage and void the warranty

Spool:

• Provides calibration data to the tuner
• Assists in finding an experienced tuner if needed

Note: Spool does not offer ready-made custom tunes

Important consideration: LPFP

The low-pressure fuel system is critical:

• Insufficient LPFP can damage the HPFP and injectors
• HPFP lubrication relies on fuel flow
• Lack of fuel can lead to wear and failure

Recommendation: ensure sufficient low-pressure side upgrade