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BMW 3-Series (E90 E92) Forum
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Hissing noise from the near surrounding of air intake
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| 12-03-2019, 03:01 AM | #1 |
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Hissing noise from the near surrounding of air intake
Hello Guys,
My name is Darek, I live in Poland. I am a proud owner of E90 335i N54. My car has a map for 350 HP. One week ago I let my car mechanic install 3' catless downpipes. Just after this mod I started hearing a hissing noise while accelerating (close to airbox). I recorded 2 movies for you to show the problem: Can it be leaky charge pipe? Is there any chance that this noise is "normal" after changing downpipes? I notices 0 power loss. Thanks in advance!  |
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| 335i, e90, leaky boost, n54 |
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