Found this post while digging up stuff for the intercooler installation guide:
So as suspected the 125 and 147TSI do have different intercoolers and means that upgrading intercoolers on a 125TSI is going to provide a greater benefit - which is also what I have discovered. This benefit is going to be even more pronounced at stage 2 and release those kW being sucked out by an overly restrictive intercooler.
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