SELECT YOUR VEHICLE
ESS S55 Piggyback Backend ECU Software
Backend ECU software for the 2014+ M3/M4 for use with aftermarket piggyback controllers that control boost, etc.
This file offers the following options :
-Correct AFR control for higher boost pressure. AFR target is set to 12:1 under high load/boost conditions.
-Removed top speed governor
-Increased RPM limiter (+400RPM)
-Removal of catalytic converter diagnostic functionality (for off road use only)
-Removal of cat heat cycle (for off road use only)
Note: Prior to sending ECU in for configuration, you must note your name and order # on the ECU.