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      03-15-2013, 07:50 AM   #275
afisherunc
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Drives: 135i
Join Date: Jun 2012
Location: North Carolina

Posts: 71
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There is definitely a different sound, although I did not notice the real difference until I compared it to an non-"pinched" car. My brother cranked his 135i next to mine (both cars are bone stock and mine is pinched, his is not) and you can certainly hear the difference on startup. You can also hear the difference when the car revs.

Just thought I would share.
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