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      12-12-2010, 01:07 PM   #26
redline2
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Drives: 335is
Join Date: May 2007
Location: Toronto

Posts: 81
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That has a relatively deep tone and seems to sound exhaust system related. Might indeed be normal. The IS exhaust is quite different from the regular 335i and I'm sure you have heard the cool gurgle when you step off the gas after acceleration. You should hear some of the noises I have coming from 335IS ... far far worse than you have posted! According to BMW service, also normal (as always).
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