POLL: How many of you have the turbo siren sound from your stock turbos?
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11-15-2012, 06:18 PM
Join Date: May 2012
I starting hearing this noise after changing the filter. When using the stock filter I get no noise.
2008 335xi AT
Cobb AP stage 1, drop in filter, the rest stock
email@example.com w/ 1.86 60' (5,800' altitude)
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