Porsche 991.1 GT3 / GT3 RS ECU Tuning

With the M-Engineering ECU flash for the Porsche 991.1 GT3 and GT3RS, adjustments are made to improve the throttle response, remove top speed limiters, adjust air/fuel ratios, and modify ignition timing and much more to improve the overall driving performance of the 3.8L and 4.0L flat-six engine. M-Engineering still utilizes all OEM ECU engine safety strategies.

We have base ECU Calibrations supporting the following vehicles, click on the link for the Calibration Notes:

• 991.1 GT3
• 991.1 GT3 RS

Maps are available in Stage 1 and Stage 2 configurations in 91, 93, 100, and E85 fuels. 

Options below can be chosen individually. M-Engineering also provides PDK Tuning for the 991 platform.

• Live Map Switching
  • Map Switching allows the driver to independently select power levels based on the octane of the fuel or fuel type by using the cruise control stalk. Map switching can be performed with the vehicle running without the need to shut the engine off.
    • Example Map Slot Setup:
      • Slot1 - Stock Power
      • Slot2 - 93 Octane
      • Slot3 - 100 Octane
      • Slot4 - E85
      • Slot5 - Valet
    • Since Map Switching can be customized depending on the individual please contact us when purchasing if you'd like a different setup or would like a custom map slot.

PLEASE NOTE - FOR THIS PRODUCT WE WILL NEED YOUR ECU SHIPPED TO US.