I had this problem a few months ago, I thought it was the wastegate actuator as MK6 GTI had the same problem, heard about fuel line vibration etc, this all happened after I went stage 2...
I could not find the problem and it seems to have now gone away or I dont notice it anymore with the radio or music playing or exhaust noise with DP.
Do you have a sunroof? If so does the noise occur when its closed?
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