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      02-13-2016, 10:22 PM   #1
IWantAnE92
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Options to make catless Active Autowerke exhaust QUIETER!

I know! I know! You all want a louder exhaust but I bought an 08 with the full Active Autowerke Cat-less Signature System exhaust and I find it a little too loud and too much of a drone at around 1500-2100rpm or so.

So what are my options in making it a little less loud? I don't think I want to go back to stock completely (that would be *too* quiet) but I'd like to at least get rid of the drone if that's possible!

I also have the bpm stage 2 tune so unless I pay for a new tune, I guess I need to stay away from complete OEM exhaust.

Thanks in advance!
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      02-14-2016, 04:01 AM   #2
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Subscribed. I have a similar issue after buying an M3 that came with the Remus Race exhaust, but I would prefer to go back to an OEM setup and just modify that.
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      02-14-2016, 04:54 AM   #3
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Adding HFC can help quiet it down a bit...oem mod rear section will help with the drone and overall loudness. In my case, I had a supercharger and it pushed my drone below 1500 rpm but kept the same overall noise. Other than changing the rear section there isn't too much you can do....assuming you want to keep the xpipe
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      02-14-2016, 04:56 AM   #4
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Quote:
Originally Posted by TWiTCHY
Subscribed. I have a similar issue after buying an M3 that came with the Remus Race exhaust, but I would prefer to go back to an OEM setup and just modify that.
Oem xpipe with primaries deleted and oem mod IIRC is a good middle ground between a full set up and completely stock. But that's what I've read, not tested in person.
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      02-16-2016, 10:06 PM   #5
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So for audio reasons only, ie not for performance reasons, would going back to oem x-pipe or oem back section yield better results?
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      02-18-2016, 09:45 AM   #6
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Quote:
Originally Posted by IWantAnE92 View Post
So for audio reasons only, ie not for performance reasons, would going back to oem x-pipe or oem back section yield better results?
Switch to the oem x pipe or a resonated one and you should be fine.
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      02-18-2016, 11:42 AM   #7
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Did not search for the thread but I tend to recall someone experimenting with quieting the AA and posted successful results. I recall the poster placing an nickel in both of the inner tailpipes. I think that was an experiment to see what affect valves would have.

Search keywords I would try would be AA and nickel
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      02-18-2016, 07:16 PM   #8
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Quote:
Originally Posted by L4ces View Post
Did not search for the thread but I tend to recall someone experimenting with quieting the AA and posted successful results. I recall the poster placing an nickel in both of the inner tailpipes. I think that was an experiment to see what affect valves would have.

Search keywords I would try would be AA and nickel
I searched but couldn't find it
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      02-18-2016, 09:38 PM   #9
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Quote:
Originally Posted by IWantAnE92
Quote:
Originally Posted by L4ces View Post
Did not search for the thread but I tend to recall someone experimenting with quieting the AA and posted successful results. I recall the poster placing an nickel in both of the inner tailpipes. I think that was an experiment to see what affect valves would have.

Search keywords I would try would be AA and nickel
I searched but couldn't find it
I couldn't find it either. Will search again.
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      02-18-2016, 09:54 PM   #10
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Arka evo.... Problem solved ��
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      02-19-2016, 11:29 AM   #11
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Put high flow cats on it. They will quite things down and smooth out the sound.
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      02-19-2016, 01:09 PM   #12
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Originally Posted by redline9001 View Post
Arka evo.... Problem solved ��
Akra evo... Wallet fucked.
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      02-19-2016, 02:19 PM   #13
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Quote:
Originally Posted by C|3R1C View Post
Adding HFC can help quiet it down a bit...oem mod rear section will help with the drone and overall loudness. In my case, I had a supercharger and it pushed my drone below 1500 rpm but kept the same overall noise. Other than changing the rear section there isn't too much you can do....assuming you want to keep the xpipe
+1
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      02-19-2016, 02:32 PM   #14
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It was so long ago and I am still convinced that I was reading about the m3 and not an e90 but here is a post from something an e90 owners performed (i know it is different platforms but it had me wondering) http://www.e90post.com/forums/showthread.php?t=942215
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      02-20-2016, 01:26 AM   #15
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Quote:
Originally Posted by L4ces View Post
It was so long ago and I am still convinced that I was reading about the m3 and not an e90 but here is a post from something an e90 owners performed (i know it is different platforms but it had me wondering) http://www.e90post.com/forums/showthread.php?t=942215
Thanks for finding it...interesting idea! I'll have to see if the local muffler guy has heard of it and whether he has any other ideas.

Thanks again for all the responses! I've getting educated here
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      02-20-2016, 03:35 PM   #16
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Does this system have resonators/middle mufflers? If not, add some. They are quite literally designed to remove drone and resonation.
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      02-23-2016, 02:08 AM   #17
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Quote:
Originally Posted by dparm View Post
Does this system have resonators/middle mufflers? If not, add some. They are quite literally designed to remove drone and resonation.
Not at the moment. That might be what I get the muffler shop to do unless I can find an OEM X-pipe.
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