- Description
- Fitment
- Refund Policy
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
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
