All parts![Spool Performance FX-350 Upgraded High Pressure Fuel Pump System — [M256]](/_next/image?url=%2Fimages%2Fparts%2Fspool-performance-fx-350-upgraded-high-pressure-fuel-pump-system-m256.jpg&w=3840&q=75)
Spool Performance · Fuel System
FX-350 Upgraded High Pressure Fuel Pump System — [M256]
$2,799.00
An upgraded high-pressure fuel pump system. Factory rail pressure becomes the hard limit on high-output and ethanol calibrations — this restores pressure under load so the tune can safely make what the hardware allows. Essential for Stage 3 builds.
Fitment
Mercedes-AMG / Mercedes-Benz — M256 inline-six
- Complete upgraded HPFP system
- Supports E30–E85 ethanol blends
- Removes the factory fuelling ceiling
- Required for most Stage 3 builds
Requires a supporting calibration. Do not run upgraded fuelling on a stock tune.
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