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The PE on my wife's 128i was muffler-only; completely axle-back. If that for the 328i includes a mid-pipe, my mistake for not realizing that. All that said, we have no drone in the 128i convertible with a PE, and I would not think it normal in a properly-installed 328 system as well.
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2013 F30 335i M-Sport 8AT/MPE/MPPK, 2011 128i M-sport Cabrio 6MT/PE |