- Description
- Fitment
- Refund Policy
The MMX Performance F8X S55 Power Control Module is a clean-sheet alternative to traditional ECU tuning for the S55-powered M2 Competition, M3, and M4. After more than 12 months of in-house development, the PCM is far more than a piggyback box, it functions closer to a secondary ECU, with a standalone PCB running MMX's own calibration and communicating in parallel with the factory ECU to optimize charge air pressure, ignition, and fueling in real time.
The result is a substantial increase in power and torque across the entire powerband, but delivered the way MMX prefers: smoothly, safely, and reliably, without compromising drivability or efficiency. The PCM keeps the OEM ECU intact and untouched, which is what enables the headline benefit: it's completely removable, leaves no trace, and is undetectable when removed. For owners who want serious gains without committing to a flashed ECU, this is the cleanest path on the platform.
Each module is housed in a finned billet aluminum case, anodized in MMX gloss black, and mounted on a carbon fiber bracket. The wiring loom is vehicle-specific, every SKU corresponds to a particular S55 variant, with calibration tuned for that car's stock output. Installation is plug-and-play into the engine bay sensor harness; no ECU removal, no permanent modifications, no special tools required.
Painstakingly engineered and hand-assembled in the UK to OEM-level quality.
Product Details
- Standalone PCB with MMX in-house calibration
- Fully removable and undetectable once removed
- Billet aluminum case, finned for cooling, MMX gloss black anodized
- Carbon fiber mounting bracket included
- Vehicle-specific wiring loom: select your variant from the dropdown
What's Included
- PCM unit (billet aluminum finned case)
- Vehicle-specific wiring loom
- Carbon fiber mounting bracket and hardware
Variant Output
- MMR50-1603: F87 M2 Competition: stock 405 HP / 550 Nm to 494 HP / 625 Nm (+89 HP / +75 Nm)
- MMR50-1604: F87 M2 Competition Sport: stock 444 HP / 550 Nm to 494 HP / 625 Nm (+50 HP / +75 Nm)
- MMR50-1605: F80 M3 / F82/F83 M4 Competition: stock 450 HP / 550 Nm to 520 HP / 660 Nm (+70 HP / +110 Nm)
- MMR50-1606: F80 M3 / F82/F83 M4 (base): stock 431 HP / 550 Nm to 510 HP / 650 Nm (+79 HP / +100 Nm)
- MMR50-1607: F80 M3 / F82/F83 M4 Competition Sport: stock 460 HP / 600 Nm to 520 HP / 670 Nm (+60 HP / +70 Nm)
Notes
- F87 M2 (N55 engine) is NOT compatible with this S55 module.
- 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.
Labor Fees (if applicable)
AM Tuning Canada is not responsible for, and shall not be liable for, any labor fees, installation charges, removal charges, diagnostic fees, or other service-related costs incurred by the customer or any third party in connection with the installation, removal, modification, servicing, or use of any products purchased from AM Tuning Canada. Unless expressly agreed to in writing by AM Tuning Canada, all such labor and service costs are the sole responsibility of the customer.
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.
