The MMX Performance G8X Power Control Module is a plug-and-play tuning module for the S58-powered G87 M2, G80 / G81 M3 and G82 / G83 M4. It raises output without flashing or removing the factory ECU, and it can be taken back off at any time.
This is not a piggyback dongle. The PCM is a standalone PCB running MMX’s own calibration, communicating in parallel with the factory ECU. It interfaces in real time with the engine’s sensor signals, optimizing output across the powerband rather than modifying the OEM ECU itself.
A PCM provides a less comprehensive level of calibration than a full ECU tune. Power levels are intentionally more conservative than those typically achieved through ECU calibration, with an emphasis on smooth and reliable operation. In exchange, the module installs in minutes, comes off just as easily, and leaves nothing behind.
The unit is housed in a billet aluminum case, finned for cooling and anodized in MMX gloss black. It mounts on a supplied carbon fiber bracket and connects through a vehicle-specific loom into the engine bay sensor harness. No tools, no permanent modification, no ECU removal.
Product Details
- Standalone PCB running MMX’s in-house calibration
- Communicates in parallel with the factory ECU rather than reflashing it
- Removable and undetectable once taken off
- Billet aluminum case, finned for cooling
- Anodized in signature MMX gloss black
- Supplied with a vehicle-specific loom and carbon fiber mounting bracket
- Simple installation with no permanent modification
What’s Included
- PCM unit in finned billet aluminum case
- Vehicle-specific wiring loom
- Carbon fiber mounting bracket and hardware
Manufacturer Published Figures
Stock and PCM output as published by MMX Performance.
- G87 M2: 450 to 550 HP, 550 to 650 Nm
- G87 M2 LCI: 480 to 580 HP, 600 to 685 Nm
- G87 M2 CS, DME flash: 523 to 600 HP, 650 to 700 Nm
- G80 M3: 480 to 580 HP, 550 to 650 Nm
- G80 M3 Competition and Competition xDrive: 510 to 610 HP, 650 to 750 Nm
- G80 M3 Competition xDrive LCI: 530 to 630 HP, 650 to 750 Nm
- G81 M3 Touring: 510 to 610 HP, 650 to 750 Nm
- G81 M3 Touring LCI: 530 to 630 HP, 650 to 750 Nm
- G80 M3 CS: 551 to 660 HP, 650 to 750 Nm
Selecting The Correct Module
The module is matched to the factory output of your car, so select the variant that corresponds to your vehicle’s OE horsepower rating.
Unconditional Satisfaction Guarantee
