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Sorry Ajshanny, I did not see your question. I get all sorts of wheezing and hissing sounds. I also get a low rpm siren sound, especially when the weather and my car is cold. The first time I heard the siren sound I somewhat thought an ambulance was in the area. I barely notice it now, not sure if it improved or I just got accustomed to it. But I never hear any reed vibration type sounds. You might should get that looked at.
The most educated person I've ever heard make a comment about the resonator was Shiv from Vishnu. He had been tuning 335s and when he first saw the resonator on a 135 he was confused. I think he even contacted BMW. Shiv said the purpose of the resonator is just to give 135s a little more of an engine sound. If anything it somewhat disrupts our airflow and would be better to be removed.
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