Spool FX-350 high-pressure fuel pumps, Audi RS Q8
A high-pressure fuel upgrade for the EA825 4,0 V8 in the Audi RS Q8. The enlarged pump bore provides approximately 90% more fuel flow than stock according to the manufacturer, giving extra headroom for larger turbos and ethanol blends.
Technical details
- Kit contains two FX-350 pumps, a 10 µm fuel filter, upgraded fuel lines and fitting hardware.
- Manufacturer-stated pressure capability up to 350 bar with appropriate system calibration.
- E85-compatible and described as plug-and-play without cutting the factory wiring.
- The ethanol monitor is described as optional; confirm whether it is included in the selected package.
Example fitments
Audi RS Q8 EA825.
IMPORTANT: The ECU pump calibration must be updated before starting the engine after installation. Also check low-pressure supply and injector capacity.
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