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      09-10-2012, 03:07 AM   #1
shocker1976
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CORSA Drone / Vibration question

Hi,
I just bought a used CORSA exhaust for my 335 MT from one of the friendly forum members. I purchased CORSA since I heard it's drone free ( at least their website says so). Anyway since there were no clamping parts, I got my stock muffler cut and the CORSA welded at a local muffler shop. After the installation I saw that the mufflers were not installed correctly, I mean the right muffler was sticking about 1/2 - 1 inch out compared to the left. Not really noticeable so I left it at there.

Now what I observed was around when driving 1700 & about 2200 rpm I hear this irritating drone apart from a vibration in the cabin. Can this be because of the difference in lengths of the mufflers. This is the first time I got an after market exhaust so I do not have much experience here.

Thanks!
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      09-10-2012, 06:26 AM   #2
mashimarho
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Doubt it would be length, but drone comes from the mufflers itself. So, your exhaust that claimed to be drone-free has drone issues... Hard to find a aggressive performance exhaust without a drone. I was in the same boat. I believe BMW PE (oem) is the only true one you can find out there. There's a few here and there as well..
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      09-10-2012, 09:09 AM   #3
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I have the Akrapovic evo full exhaust in stainless on my E92 Msport, no drone but just like the others slight rattle at certain rpms. Solution: rattle usually comes from the rear center console slider. Open the slider put some velcro, fuzzy section where it latches. Gets rid of the rattle, I also added a clean microfiber towel folded up inside the tray to act as a sound absorber, no more rattle.
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      09-10-2012, 11:05 AM   #4
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Quote:
Originally Posted by Biohazard29 View Post
I have the Akrapovic evo full exhaust in stainless on my E92 Msport, no drone but just like the others slight rattle at certain rpms. Solution: rattle usually comes from the rear center console slider. Open the slider put some velcro, fuzzy section where it latches. Gets rid of the rattle, I also added a clean microfiber towel folded up inside the tray to act as a sound absorber, no more rattle.
You are right, need to try this out. Thanks again.
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      09-10-2012, 03:33 PM   #5
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Every Corsa exhaust I have heard (E36 M3/E46/E9X) has droned. Thankfully my AA exhaust doesn't drone at all
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