E46 M3 – MSS54HP CSL Clone ECU Conversion Service


MSS54HP CSL ECU Conversion.

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Purchase of this service requires you to send your MSS54HP to us, where we will bench flash, and tune your ECU to suit the fitment of a CSL style airbox along with a 1 bar MAP sensor.

The tune will suit stock E46 M3 cams and fueling, timing, vanos etc are all recalibrated to suit. Most healthy vehicles will make around ~350-360BHP with the ECUWorx CSL tune.

The conversion does not include installation of the additional ‘H-bridge’ which is required for the operation of the motorised flap on the OEM CSL airbox. If you require this, please contact us before purchase.

Please include details of which type of MAP sensor and IAT sensor you’ll be using as part of the order please.

Additional information


Inside UK, Outside UK