BMW 3-Series (E90 E92) Forum - View Single Post - POLL: How many of you have the turbo siren sound from your stock turbos?

raceyBMW · 11-14-2012, 02:10 PM

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.

11-14-2012, 02:10 PM	#20
raceyBMW king of the hills 92 Rep 2,915 Posts Drives: 2011 M3 w/ESS55, 2001 540i/6 Join Date: Dec 2006 Location: Arvada, CO iTrader: (1) Garage List 2001 BMW 540i/6 [8.17] 1994 530i [9.00] 2007 335i Coupe [8.37]	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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