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      03-16-2012, 11:25 AM   #10
bigjae1976
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Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Wichita, KS

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2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
In case anyone runs into this same issue, I used a fully threaded 3/8"x3" bolt with 2 nuts and 3 fender washers. You should probably use a 2" long bolt...I had to chop off about an inch since the bolt was really close to the diff.

It sounds just like stock except a little louder. Can't tell with the window up unless you turn the radio off. There is a noticeable increase with the windows down. I dropped off my OEM exhaust at Soul Speed in Austin to do the OEM mod covering the large perforated section. I'm going to try the OEM mod and then decide.
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2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red