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      11-14-2012, 03:10 PM   #21
raceyBMW
king of the hills
 
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Drives: 335i coupe
Join Date: Dec 2006
Location: Denver, CO

Posts: 2,681
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1994 530i  [4.25]
2007 335i Coupe  [4.07]
I only really started to notice mine after the catless DP install. Pretty loud first thing in the morning, but starts to go away after it warms up.

Before the DPs it would only be the faintest sound early in the AM when cold.
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