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      02-06-2012, 03:51 PM   #7
Denk
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Drives: e92 M3 ZCP
Join Date: May 2011
Location: PNW

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The only thing they have in common is the Inconel. The Eisenmann Inconel is basically their race exhaust (inner construction)...that's what I was told when I was shopping around awhile back. It's a lot louder than the M Performance.