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I myself do have an AA sig exhaust, I love how it looks and sounded but I did drone. For me it doesnt bother me much, only people who do sit in the car with me. However, it was not loud enough for me, so I decided to take out my resonator. I love how it sounds now, the drone didnt change much. The only issue I had with it since it was designed on a 328i and I have a 325i, the piping doesnt match up since it is water blaster in different areas. One sheriff decided to threaten to ticket me sound wise, but thats because she pulled me over for the second time for my blue halos. Now there are many people on the forum that say that they do NOT drone with AA's sig exhaust. If I felt like dumping more money into my setup I would throw a performence muffler on just to kill the drone. But honestly I have read so many good reviews on the BMW Perf exhaust and it sounds great so if you could throw down about $1000 I would go with that.
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