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S55 Piggyback Backend ECU Software


Product Description

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.

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