All parts
A1 Parts · Fuel System
M177 / M178 Fuel Injectors
$420.00
Direct injectors for the M177 and M178 4.0L V8 biturbo. Worn or mismatched injectors show up as uneven fuel trims and rough cold starts long before they throw a code, and on a tuned car that inconsistency limits how aggressive the calibration can safely be.
Fitment
Mercedes-AMG M177 / M178 4.0L V8 biturbo
- Direct-injection spec
- Restores consistent fuel delivery
- Supports higher-output calibrations
- Sold as a set
![Spool Performance Stage 3 Low Pressure Fuel Pump — C63 [M177]](/_next/image?url=%2Fimages%2Fparts%2Fspool-performance-stage-3-low-pressure-fuel-pump-c63-m177.jpg&w=3840&q=75)
![Spool Performance Stage 3 Low Pressure Fuel Pump — E63 [M177]](/_next/image?url=%2Fimages%2Fparts%2Fspool-performance-stage-3-low-pressure-fuel-pump-e63-m177.jpg&w=3840&q=75)
![Spool Performance Stage 3 Low Pressure Fuel Pump — GT63 [M177]](/_next/image?url=%2Fimages%2Fparts%2Fspool-performance-stage-3-low-pressure-fuel-pump-gt63-m177.jpg&w=3840&q=75)
Ready to get A1Tuned?
Tell us about your vehicle and your goals. We'll review your request and send an honest, itemized quote — no pressure, no hype.