BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > db rating for M Perfromance silencer for m135i
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      10-07-2015, 10:51 AM   #1
dape90
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db rating for M Perfromance silencer for m135i

Hi All,

I was wondering if anyone could help.

I take delivery of my m135i in December and i am unsure about fitting the M Performance silencer.
I like to do about 3 to 4 track days a year and some of the tracks i go to are very restrictive on DB levels.

Does anyone know the DB levels for the standard silencer and the M Performance version?
I have had a look around but not had much luck in finding any technical data. And the parts department at the two dealers I spoke to have not got a clue. in fact one guy was so unhelpful anyone would have though I have asked him for the chemical formula to turn lead into gold!

Anyway, if anyone could help that would be great as i don't want to be asked to leave any trackdays because i opted for the M Performance option.

Cheers

D
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      10-07-2015, 11:00 AM   #2
ovekvam
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I think the noise level is mentioned in the car documents in Germany, so anyone with a standard, German M135i should be able to answer that part. A little bit more difficult with addon parts, but there is probably some TÜV-papers for it. Maybe search for "gutachten".
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      10-08-2015, 07:06 AM   #3
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I've seen a YoutUbe video showing this recently try a quick search in there...?
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      10-09-2015, 09:42 AM   #4
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YT video



Enjoy !
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