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      03-02-2010, 05:59 PM   #2
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Drives: 2011 E90 M3 Comp Pkg Only
Join Date: Nov 2007
Location: Astral Projecting: ∞ 23.516 -122 02.625 0242.101 ĕv'rē-hwr'

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Without measuring the db differnce between stock and Dinan I can't really give you a % of how much louder it is. However, the stock exhaust is very quiet at idle IMO, the Dinan is definately louder and adds more "bass" to the sound of the exhaust note. Heard it just yesterday when the SA drove it away for service. I personally love it and wouldn't want anything louder on this car. Again, JMNSHO