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      02-13-2009, 03:34 PM   #8
M3 Montreal
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Drives: 2012 M3 SG ,DCT & 2011 S4
Join Date: Oct 2008
Location: Montreal , Canada

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Both are great systems you can't go wrong with.

I personally chose the AA because it's more quiet which is what I want since I will also be adding the AA X-pipe later. Eisenmann with X-Pipe would be too loud for my taste.

Oh yeah .... I also like the Dyno of the AA since most exhausts are more about "sound" and not power.
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