Here I am offering a service to reprogram the BMW E46 M3 ECU (MSS54 and MSS54HP) to an MAF based tune for the stock intake manifold keeping the MAF sensor in place + modifications to make the ECU run as a stand alone system allowing for swaps into other cars or to use in motorsport.  This allows the engine to run without other systems like SMG, EWS and ACS/DSC/ABS and without the catalytic converters and secondary lambda sensors. 

Specifications

• MAF based tune used with MAF sensor and stock airbox
• 15-20hp gain / 15Nm gain
• Removed top speed limiter
• Raised rev limiter to 8200rpm
• Shift lights enabled (does not work for every car)
• EWS delete
• SMG conversion to manual in SMG ECUs (including M3 CSL)
• ASC/DSC/ABS signal requirement delete
• no lower dyno rev limiter
• secondary lambda sensor / cat. delete
• sport memory button always on
• auxiliary air pump delete
• internal EGR delete (reduces carbon buildup)
• correction of all error codes that can get triggered
• lift-off burble can be added at no extra cost

IMPORTANT:  this is an auction for the service and not for an ECU.  You will need to send me the ECU to have it reprogrammed and it will be returned to you with insured postage.  The MSS54/MSS54HP ECUs come with many part numbers.  This is not important as they are all covered in this service.  The ones on the picture are for illustration only and the service is not limited to those numbers.