Options to make catless Active Autowerke exhaust QUIETER!

IWantAnE92 · 02-13-2016, 08:22 PM

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!

TWiTCHY · 02-14-2016, 02:01 AM

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.

C|3R1C · 02-14-2016, 02:54 AM

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

C|3R1C · 02-14-2016, 02:56 AM

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.

IWantAnE92 · 02-16-2016, 08:06 PM

So for audio reasons only, ie not for performance reasons, would going back to oem x-pipe or oem back section yield better results?

SYT_Shadow · 02-18-2016, 07:45 AM

Quote:

Originally Posted by IWantAnE92

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.

L4ces · 02-18-2016, 09:42 AM

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

IWantAnE92 · 02-18-2016, 05:16 PM

Quote:

Originally Posted by L4ces

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

L4ces · 02-18-2016, 07:38 PM

Quote:

Originally Posted by IWantAnE92

Quote:

Originally Posted by L4ces

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.

redline9001 · 02-18-2016, 07:54 PM

Arka evo.... Problem solved ��

dparm · 02-19-2016, 09:29 AM

Put high flow cats on it. They will quite things down and smooth out the sound.

rjd598 · 02-19-2016, 11:09 AM

Quote:

Originally Posted by redline9001

Arka evo.... Problem solved ��

Akra evo... Wallet fucked.

RoundelObsession · 02-19-2016, 12:19 PM

Quote:

Originally Posted by C|3R1C

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

L4ces · 02-19-2016, 12:32 PM

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

IWantAnE92 · 02-19-2016, 11:26 PM

Quote:

Originally Posted by L4ces

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

dparm · 02-20-2016, 01:35 PM

Does this system have resonators/middle mufflers? If not, add some. They are quite literally designed to remove drone and resonation.

IWantAnE92 · 02-23-2016, 12:08 AM

Quote:

Originally Posted by dparm

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.

02-13-2016, 08:22 PM	#1
IWantAnE92 Lieutenant 31 Rep 512 Posts Drives: 2008 E90 M3 6MT Join Date: Jul 2010 Location: Harvard MA iTrader: (9)	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, 02:01 AM	#2
TWiTCHY Colonel 376 Rep 2,526 Posts Drives: '13 AW E92 M3 Join Date: Jul 2008 Location: WA iTrader: (6)	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, 02:54 AM	#3
C\|3R1C So Kewl Guy 49 Rep 619 Posts Drives: 2010 E93 M3 DCT Join Date: Sep 2011 Location: Los Angeles iTrader: (3)	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 __________________ 2010 E93 M3 / MS Catless X-Pipe / AA Catback / Vorsteiner Vented Hood and Bootlid E93 Trunk / ADV1 7.1 Wheels GB / LS3 LED Lights / Harrop Supercharger
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02-16-2016, 08:06 PM	#5
IWantAnE92 Lieutenant 31 Rep 512 Posts Drives: 2008 E90 M3 6MT Join Date: Jul 2010 Location: Harvard MA iTrader: (9)	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, 09:42 AM	#7
L4ces Major 337 Rep 1,489 Posts Drives: 2008 E92 M3 Alpine White Join Date: Aug 2010 Location: NJ - NY iTrader: (0) Garage List 2008 M3 [0.00]	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, 07:54 PM	#10
redline9001 Captain 223 Rep 979 Posts Drives: E92 M3, F15 X5, G14 F150 Join Date: Apr 2011 Location: Calgary, Canada iTrader: (0)	Arka evo.... Problem solved �� __________________ 2011 E92 M3 \| JEREZ BLACK \| EXTENDED BAMBOO NOVILLO \| EXECUTIVE PKG \| M-DRIVE \| EDC \| M-DCT MODS \| KW S/O \| HRE P40SC \| Akra Evo \|ESS Akra Tune \| ESS DCT tune \| BMC drop in \| StopTech Trophies \| TMS Pulley \| LUX V3 \| BE Bearings and BE ARP rod bolts
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02-19-2016, 09:29 AM	#11
dparm Stop the hate, get a V8 3851 Rep 8,625 Posts Drives: C7 Corvette GS, AMG C63 S Join Date: Jun 2013 Location: Frisco, TX iTrader: (1)	Put high flow cats on it. They will quite things down and smooth out the sound. __________________ Now: 2017 Corvette Grand Sport, 2021 AMG C63 S sedan Past: 2011.5 M3 sedan ZCP
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02-19-2016, 12:32 PM	#14
L4ces Major 337 Rep 1,489 Posts Drives: 2008 E92 M3 Alpine White Join Date: Aug 2010 Location: NJ - NY iTrader: (0) Garage List 2008 M3 [0.00]	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, 01:35 PM	#16
dparm Stop the hate, get a V8 3851 Rep 8,625 Posts Drives: C7 Corvette GS, AMG C63 S Join Date: Jun 2013 Location: Frisco, TX iTrader: (1)	Does this system have resonators/middle mufflers? If not, add some. They are quite literally designed to remove drone and resonation. __________________ Now: 2017 Corvette Grand Sport, 2021 AMG C63 S sedan Past: 2011.5 M3 sedan ZCP
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