There aren’t any problems. As with the map, would it be stage 1? Best way to do it is get a cotton panel filter, a nice exhaust, either cat back or turbo back, get the clutch uprated as a diesel will destroy a standard clutch within a month of a map, then get the map. I’m hoping to get mine done, already have the filter, need to get the clutch done next as mine is slipping as standard car, then get a Milltek stainless cat back, then finally off to Amd in Essex for a custom map and rolling road run. I know the clutch is going to set you back some notes, a Sachs organic one with lightened flywheel will set you back around £1300, an exhaust, cat back is around £450, map around £200. So the cheapest thing is the panel filter at around £40. Hope that helps.