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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Apr-18-2019, 02:42:12 PM   #1
tjkenny15
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Default Quiet Exhaust Thread

I've been researching my options for a quiet section 3. I recently installed a Streamline CSL airbox and would like to preserve the induction noise that comes from it. It appears that with most exhaust setups I've had and have heard from others, the better flowing exhaust tend to be louder (exponentially at higher RMPs). Another variable to this is adding headers into the mix. Catless headers and stepped headers tends to take away a lot of the beauty of some of the popular section 3s I've heard over the years.

Is a louder exhaust and higher top end performance mutually exclusive?

Is there a section 3 you would recommend that could provide a low to moderate increase in resonance while preserving the induction noise of a CSL airbox?

I would gear my search towards 'Sports' exhaust section 3s but even with these, they tend to be a tad to loud for my stepped header setup w/ stock sec. 2.

What would you recommend? Thanks!
-TJ
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Last edited by tjkenny15; Thu, Apr-18-2019 at 03:55:47 PM.
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Old Thu, Apr-18-2019, 02:56:42 PM   #2
Kcalhoun27
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Default Re: Quite Exhaust Thread

You could try the modified stock muffler route. Seemed to be a modest change in sound for the cost of removing the stainless mesh and welding it back closed


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Old Thu, Apr-18-2019, 03:10:37 PM   #3
malacai17
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Default Re: Quite Exhaust Thread

*quiet
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Old Thu, Apr-18-2019, 03:18:12 PM   #4
bmw m3 s50
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Default Re: Quite Exhaust Thread

Quote:
Originally Posted by tjkenny15 View Post
I've been researching my options for a quite section 3. I recently installed a Streamline CSL airbox and would like to preserve the induction noise that comes from it. It appears that with most exhaust setups I've had and have heard from others, the better flowing exhaust tend to be louder (exponentially at higher RMPs). Another variable to this is adding headers into the mix. Catless headers and stepped headers tends to take away a lot of the beauty of some of the popular section 3s I've heard over the years.

Is a louder exhaust and higher top end performance mutually exclusive?

Is there a section 3 you would recommend that could provide a low to moderate increase in resonance while preserving the induction noise of a CSL airbox?

I would gear my search towards 'Sports' exhaust section 3s but even with these, they tend to be a tad to loud for my stepped header setup w/ stock sec. 2.

What would you recommend? Thanks!
-TJ
Your best bet in your situation would be to run a Supersprint Street Muffler. It is a very quiet muffler and will not drown out the CSL airbox. You get some weight savings over the OEM muffler but not alot compared to other mufflers. Performance is also there by having better flow then the OEM muffler.
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Old Thu, Apr-18-2019, 03:35:06 PM   #5
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Default Re: Quite Exhaust Thread

I thought the same, went back to stock, but got bored after a while and am back first to ss sport, then that wasn't enough, now to scorza. Unless the muffler is stupid loud, you're gonna be able to hear the airbox just fine.
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Old Thu, Apr-18-2019, 04:02:13 PM   #6
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Default Re: Quite Exhaust Thread

Anyone have an opinion on gutted stock vs scorza?

I love how the scorza sounds when it brings down the exhaust note a bit and obviously pumps up the volume. Can I expect something similar with a gutted stock?
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Old Thu, Apr-18-2019, 04:02:49 PM   #7
tjkenny15
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Default Re: Quite Exhaust Thread

Quote:
Originally Posted by malacai17 View Post
*quiet
Note to self - proofread, even the thread title

Quote:
Originally Posted by bmw m3 s50 View Post
Your best bet in your situation would be to run a Supersprint Street Muffler. It is a very quiet muffler and will not drown out the CSL airbox. You get some weight savings over the OEM muffler but not alot compared to other mufflers. Performance is also there by having better flow then the OEM muffler.
I've never real been a fan of the SS offerings but I don't believe I've ever heard the Sport version. Might need to hear one in person.

Quote:
Originally Posted by TboneM3 View Post
I thought the same, went back to stock, but got bored after a while and am back first to ss sport, then that wasn't enough, now to scorza. Unless the muffler is stupid loud, you're gonna be able to hear the airbox just fine.
I like the idea of opening up the stock exhaust and since they are so inexpensive, I may consider that as an option. Scorzas seem to break-in, right?

I would honestly consider all options, Scorpion, UUC, Meisterschaft, really anything.
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Old Thu, Apr-18-2019, 04:03:20 PM   #8
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Default Re: Quite Exhaust Thread

I was thinking of just getting a Borla muffler, from what I've seen it's not crazy loud and has a nice deeper tone to it
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Old Thu, Apr-18-2019, 05:14:17 PM   #9
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Default Re: Quite Exhaust Thread

My vote is for Dinan. It's the best sounding lower volume muffler IMHO.
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Old Thu, Apr-18-2019, 05:15:29 PM   #10
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Default Re: Quite Exhaust Thread

SS Sport or Scorza, a resonated x-pipe, a rasp pipe (RE/CPI RTX/pick a flavor), and euro headers would prob be "quiet" enough.

Bud of mine had AFE intake with CPI stepped headers > RE rasp pipe > RE unresonated X > SS Sport and it was the perfect mix inside the car so I can only imagine CSL intake would be way better.
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Discussing Quiet Exhaust Thread in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)