Has anyone heard of these guys? https://www.turner-race-developments.co.uk/ For £299 I can have 310bhp and 700nm. Was asked about the ECU, because two types, one that can be mapped from the OBD and one where the ECU has to be removed. I advised that it the one that takes longer. For this bring someone in to upload the map. Not sure how they guarantee the final figures without a rolling road?