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k4ith I believe its a ECU remap.

You drive in, they read your ECU via diags port, mod it and flash it back.

Or at the end of Feb you can buy the Modual to DIY for an extra £200, but from what I have been told the remap is totally undetectable, so no need to flash back.
 
just hope that you have no interuptions when uploading to the ECU

similar systems caused buggered ECU's that locked up