Thread: POLL: How many of you have the turbo siren sound from your stock turbos?
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      12-06-2015, 05:06 PM   #145
924er
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Drives: e92 335i '10
Join Date: Feb 2014
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My turbos whine/siren when cold only but once it warms up its fine. They said its common for turbos to whine when cold
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'10 e92 N54

DCI intakes, ER chargepipe, TIAL BOV,
VRSF 5in FMIC, BMS Downpipes COBB e30
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