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The M-Tuner is the first, and only, at-home OBD flashing utility! Developed by M-Engineering, M-Tuner integrates all features of the M-Logger and adds them with the ability to flash anytime, anywhere!

What's Included?

  • M-Tuner Dongle for OBD Flashing
  • USB Cable
  • M-Engineering maps built for your M840T 
  • On-the-fly Live Map Switching
  • M-Engineering Support Through MSL Performance 

The Following exclusive features are included with the M-Tuner Package for 4.0L McLarens:

  • Live Map Switching
    • This includes stage calibrations for Stage 1 & Stage 2 vehicle configuration. Remote custom tuning is available for different vehicle configurations as well.
    • Performance Stage 1 & Stage 2 calibrations include the following map slots by default:
    • Slot 1 - 91 Octane
    • Slot 2 - 93 Octane
    • Slot 3 - 100+ Octane
    • Slot 4 - Valet (Limits boost, load, and throttle) 
    • *Please contact us at time of ordering if you wish to have different map slots.
  • Datalogging
  • Live Data
  • Clear Faults
  • Dyno Mode Enable/Disable
  • Auto Start/Stop Disable
  • Left Foot Braking
  • Kickdown Disable
  • Loud Start

Stage 1- Ecu calibration with Dyno before and after. (switchable maps included for stage 1) 

Stage 2- Ecu calibration with Dyno before and after. (switchable maps included for stage 2) Supply and fitting of MSL Performance Deact downpipes. 

Stage 2+ - Ecu calibration with Dyno before and after. (switchable maps included for stage 2+) Supply and fitting of MSL Performance Deact downpipes and M-Engineering injector harness with Upgraded Injectors supplied and fitted.

*M-Tuner requires a one time only bench procedure which requires the ECU to be sent to M-Engineering HQ. This Package will take 1-2 weeks to complete. Kindly be aware that a £50 deposit is required. Upon payment, our team will reach out to you to schedule a booking for dyno testing and calibration.The process will occur at our workshop on unit 1 Armoury Road, B11 2PP, and may take up to 4 hours to complete. Please note the £50 deposit will be removed off the package price below and remaining balance must be paid in full on day of Calibration. 

Disclaimer: You accept responsibility and risks of any tunes and added features by M-Engineering. If you are not the end user of the car, you will be solely responsible for notifying the purchaser and/or customer they also accept the responsibility and risks of these and M-Engineering is not liable. M-Engineering / MSL Performance is also not liable for voided warranties due to installation of our products. 

Return Policy: All sales are final and non-refundable. M-Engineering / MSL Performance  provides specific software calibrations for individual vehicle use and is not liable for misuse or vehicle behavior due to installation error or mechanical issues. 

Calibration Type
Collections: McLaren Ecu Tuning Vendors: MSL Performance SKU: