MMX Performance G8X M2 M3 M4 Power Control Module | S58
The MMX Performance G8X M2 / M3 / M4 Power Control Module brings MMX's standalone-tuning architecture to the latest generation of S58-powered M-cars. Where the G-Series M-cars can be challenging to tune through traditional ECU flashes (particularly when warranty considerations are a factor) the PCM offers a clean alternative: a plug-and-play module that delivers a substantial power increase, can be removed at any time, and leaves no electronic trace once disconnected.
This isn't a piggyback dongle. After more than 12 months of in-house development, the PCM is closer to a secondary ECU, a standalone PCB running MMX's own calibration that communicates in parallel with the factory ECU. By interfacing in real time with charge air pressure, ignition, and fuelling channels, it safely optimises engine output across the entire powerband without modifying or flashing the OEM ECU.
Each PCM is housed in a finned billet aluminium case, anodised MMX gloss black, and mounted via an included carbon fibre bracket. Installation is genuinely plug-and-play into the engine bay sensor harness, no tools, no permanent modifications, no ECU removal. The unit is fully reversible and undetectable when removed.
Engineered and hand-assembled in the UK, with tens of thousands of development miles on dyno, road, and track.
Product Details
- Standalone PCB with MMX in-house calibration
- Substantial power and torque gains across the entire powerband
- Fully removable and undetectable once removed
- Billet aluminium case, finned for cooling, MMX gloss black anodised
- Carbon fibre mounting bracket included
What's Included
- PCM unit (billet aluminium finned case)
- Vehicle-specific wiring loom
- Carbon fibre mounting bracket and hardware
Power Gains (per manufacturer)
- G87 M2 (2023+): +100 HP / +100 Nm, 450 HP stock to 550 HP / 550 Nm to 650 Nm
- G87 M2 LCI (2025+): 480 HP stock to 580 HP / 600 Nm to 685 Nm
- G87 M2 CS (DME flash variant): 523 HP stock to 600 HP / 650 Nm to 700 Nm
- G80 M3 / G82 M4 High Output: +110 HP / +140 Nm
Vehicle Applications
Notes
- Includes a 1-year manufacturer warranty against defects in materials and workmanship
- Designed and tested in the United Kingdom
- View emissions compliance notice
- Not for sale or use in California