The MMR aftermarket ECU for the BMW M3 CS and M4 CS F8x allows power to be increased to approximately 520 ch while delivering over 70 Nm of additional torque. Developed specifically for the highest-performance versions of the S55 engine, it significantly improves acceleration, responsiveness, and torque delivery.
Thanks to its electronics developed in-house by MMX Performance, the PCM acts as a true auxiliary control unit capable of continuously optimizing engine parameters without altering the original engine management system.
Supplied with a dedicated Plug & Play wiring harness, a carbon fiber bracket, and a high-quality aluminum housing, this system offers a simple, reliable, and fully reversible installation.
An ideal solution for fully unlocking the potential of the CS models.
The unit is housed in a superb machined aluminum housing, featuring cooling fins to ensure adequate cooling, as well as a stunning carbon fiber mounting bracket that allows it to be securely mounted in your engine compartment.
Important Information: Aftermarket control units modify the engine’s operating parameters and may alter the vehicle’s performance characteristics (power, torque, emissions, etc.). Installing them may render the vehicle non-compliant with its original approval and prohibit its use on public roads under applicable regulations. These products are intended for use on a racetrack or in accordance with applicable laws.
