Thanks Froop.
Well I am guessing your friend's Eisenmann has some sort of resonator delete for the factory N55 midpipe? That seems to be key in the burbles although my PE without resonator delete still burbles quite a bit.
I'm suprised to see so many people running N55 mids on N54 cars but none with a resonator delete. That said I think that a majority of those with N55 mids on N54 cars do not have PE or have a 1M. It looks like I am test pilot then; perhaps me and kleach can arrange for some similar videos to be recorded to show the difference.
I guess the benefit is that if I don't like it I can just put the resonator back on.
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