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

rallakias · 03-17-2013, 06:47 AM

My 2007 E90 335i was a perfect limo until i installed the 3'' ardesign catless downpipes!From that time on the well known ''turbo-whine'' is present mainly on part-throttle driving conditions .
I don't care if my turbos are going to die soon.I just want to reduce this sound so i was thinking that covering the downpipes with a soundproof material maybe a solution to the problem.I am sure that the problem comes from the less restrictive downpipes and just that ,because it all started by the time i made this change to catless dps.It is a very annoying sound especially for a family car.

Has anyone tried this (downpipes wrapping) in order to reduce this turbo-siren sound?

03-17-2013, 06:47 AM	#95
rallakias New Member 7 Rep 22 Posts Drives: F30-330e Join Date: Apr 2012 Location: Greece-Athens iTrader: (0)	My 2007 E90 335i was a perfect limo until i installed the 3'' ardesign catless downpipes!From that time on the well known ''turbo-whine'' is present mainly on part-throttle driving conditions . I don't care if my turbos are going to die soon.I just want to reduce this sound so i was thinking that covering the downpipes with a soundproof material maybe a solution to the problem.I am sure that the problem comes from the less restrictive downpipes and just that ,because it all started by the time i made this change to catless dps.It is a very annoying sound especially for a family car. Has anyone tried this (downpipes wrapping) in order to reduce this turbo-siren sound? Last edited by rallakias; 03-17-2013 at 11:36 AM..
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