I have the same setup as yours, I also love more sound but what stops me from fitting catted downpipe is that it will get really loud, MPPSK doesnt have valve to control the noise so its always open. One thing I might do is replace MPE with a valved one (not really fan of MPE noise) and maybe put catted downpipe along with resonator delete.
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2018 G30 540i
2011 M3 E92
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