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      05-26-2010, 06:38 PM   #1
smmmurf
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Exhaust Modification (inspired by Periokid/Subw00er)



I got exactly what I was looking for, a slightly louder and more aggressive tone with absolutely no drone. I can't even tell the exhaust is modified when on the highway. The first part of the video is stock. Then, around 1:25, the car goes up on the lift and the modded muffler is installed.

Thanks to Todd at Exhaust Works in Belmont for the welding work and the install and M3post member armorrig for the stock exhaust!

Link to mod description: http://www.m3post.com/forums/showthread.php?t=320052
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      05-26-2010, 07:47 PM   #2
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awesome
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      05-26-2010, 10:48 PM   #3
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r!cer boi.... lulz

sounds good dude.
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      05-26-2010, 11:12 PM   #4
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Quote:
Originally Posted by smmmurf View Post
[u2b]<object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/yEFoiS1NV7s&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/yEFoiS1NV7s&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>[/u2b]

I got exactly what I was looking for, a slightly louder and more aggressive tone with absolutely no drone. I can't even tell the exhaust is modified when on the highway. The first part of the video is stock. Then, around 1:25, the car goes up on the lift and the modded muffler is installed.

Thanks to Todd at Exhaust Works in Belmont for the welding work and the install and M3post member ARMORRIG for the stock exhaust!

Link to mod description: http://www.m3post.com/forums/showthread.php?t=320052
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      05-26-2010, 11:17 PM   #5
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From what I can hear, it is slightly louder. Are you satisfied with the result of your project? This is definitely a good way to become a little bit more aggressive than stock without spending thousands just for the sound.
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      05-26-2010, 11:17 PM   #6
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Need more time in the video devoted to the sexy modded exhaust!
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      05-27-2010, 02:23 AM   #7
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Quote:
Originally Posted by armorrig View Post
From what I can hear, it is slightly louder. Are you satisfied with the result of your project? This is definitely a good way to become a little bit more aggressive than stock without spending thousands just for the sound.
Definitely satisfied. It is actually significantly louder. However, it isn't louder to the point where anybody suspects its modified. It also doesn't drone at all, which is awesome!
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      05-27-2010, 02:28 AM   #8
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Quote:
Originally Posted by smmmurf View Post
Definitely satisfied. It is actually significantly louder. However, it isn't louder to the point where anybody suspects its modified. It also doesn't drone at all, which is awesome!
Good that you like it man. I know it's hard to tell from the video how it really sounds. Heck, I can't even tell how my exhaust sounds from inside the car.
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      05-27-2010, 02:32 AM   #9
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Quote:
Originally Posted by armorrig View Post
Good that you like it man. I know it's hard to tell from the video how it really sounds. Heck, I can't even tell how my exhaust sounds from inside the car.
The only drawback is that the stock exhaust is pretty heavy at ~50 pounds. I might do a catted and resonated x-pipe in the future, but the sound level is pretty perfect as it is.
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      05-27-2010, 05:02 AM   #10
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I heard a catted w/ additional resonatored xpipe on stock exhaust and that thing was on the LOUD side. Though I only heard it being revved while parked. I'm pretty sure it was equally as loud being driven.
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      05-27-2010, 07:01 PM   #11
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[quote=armorrig;7391072]I heard a catted w/ additional resonatored xpipe on stock exhaust and that thing was on the LOUD side. Though I only heard it being revved while parked. I'm pretty sure it was equally as loud being driven.[/QUOTE

My current setup is just that, OEM exhaust mod and I gutted the secondary cats on the OEM x-pipe... it is loud. I definately get some looks from people on the streets now. I am cooking up a video very soon.
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      05-28-2010, 12:13 AM   #12
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Post video soon i was planning to do the same thing...
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      05-28-2010, 12:14 AM   #13
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damn i have to put a write up on mine soon i just have been so lazy to do it... this is probably the best and the cheapest mod to do in an m3....
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      05-28-2010, 02:47 AM   #14
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Sounds so much better! Should've come from the factory sounding like this.
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      06-02-2010, 02:50 AM   #15
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I updated the video with more drivebys. Go to
for direct link to the new section.
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      06-03-2010, 01:27 PM   #16
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So you've replaced the perf pipes with straight pipes? Did they need to cut open both sides in order to weld in the pipes, or was the top opening sufficient?
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      06-03-2010, 02:25 PM   #17
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Quote:
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So you've replaced the perf pipes with straight pipes? Did they need to cut open both sides in order to weld in the pipes, or was the top opening sufficient?
Just the top opening was sufficient. See the video if you want to see the exhaust off the car.

I did go to a very experienced muffler shop (25+ years). The owner was very comfortable welding in blind/tight spaces.
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      06-03-2010, 03:36 PM   #18
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Quote:
Originally Posted by smmmurf View Post
[u2b]<object width="640" height="385"><param name="movie" value="http://www.youtube.com/v/N1NBdooQ-g8&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/N1NBdooQ-g8&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object>[/u2b]

I got exactly what I was looking for, a slightly louder and more aggressive tone with absolutely no drone. I can't even tell the exhaust is modified when on the highway. The first part of the video is stock. Then, around 1:25, the car goes up on the lift and the modded muffler is installed.

Thanks to Todd at Exhaust Works in Belmont for the welding work and the install and M3post member armorrig for the stock exhaust!

Link to mod description: http://www.m3post.com/forums/showthread.php?t=320052

sounds just like mine... the only thing I did different was I sealed up every hold on both sides...
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      06-03-2010, 08:36 PM   #19
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Quote:
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sounds just like mine... the only thing I did different was I sealed up every hold on both sides...
That must be really loud! Lol...
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      06-04-2010, 01:34 PM   #20
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Sounds so much better! Should've come from the factory sounding like this.
+1
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      07-06-2010, 02:43 AM   #21
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Quote:
Originally Posted by 1sikbmr View Post

sounds just like mine... the only thing I did different was I sealed up every hold on both sides...


Can you post a video of the sound? Is there drone with both sides replaced with straight pipes? And also, what did you end up doing with thefilling?
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      07-06-2010, 07:39 AM   #22
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Very nice results.
So to clarify the modification did you:
1) Replace the completely perforated pipe with a solid pipe (welded in)
2) Leave the partially perforated pipe alone
3) Put the glass fiber insulation back in

Sounds great, not too loud but with a nice sound.
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