MSS54 / MSS54HP Full CSL Hardware/Firmware Conversion

Convert your MSS54 or MSS54HP to run the full BMW CSL software. This conversion also allows for use of the OEM CSL air flap and a MAP sensor when you use the CSL air intake box. This software is the most superior base for tuning your S54 without a MAF. Ideal for CSL airbox, ITB stack kits, or simply just MAF deletes.

Convert your MSS54 or MSS54HP to full OE CSL spec with this conversion. We add the necessary capacitors and H-Bridge to the boards so that all S54 CSL functionality is retained including the stock OE motorized intake flap if desired. 

**IMPORTANT**

ISN’s are reset so EWS needs to be reset or deleted, meaning you will need a tool that can realign the EWS once you receive the DME back to get the car started. *SO BY DEFAULT WE JUST SEND THESE WITH THE EWS DELETE* .  The full CSL firmware is BDM’d directly onto your ECU. This is not a hamstrung cobbled together firmware, this is a genuine CSL full binary.

MSS54 NON HP cost $255 to upgrade to genuine HP DME’s.

**Performance Tune**

Our performance tune can pick up over +20WHP and +20WTQ over the factory CSL Firmware on a US car and is always recommended for getting the car properly calibrated. OTS Tunes come with a complimentary 2 revisions to get dialed into your specific setup.