M2 Muffler mod

F87source · 02-22-2021, 11:30 PM

Very interesting.

3LiterBeater · 03-29-2021, 06:06 PM

Wanted to bump this- happen to have the diameter of pipes you used when replacing the OEM pieces? Or if you have the OE measurements.

Thanks

VisualEcho · 09-11-2021, 06:35 PM

Bumping this thread in search of anyone else that has done this.

VisualEcho · 09-11-2021, 07:25 PM

The way Yellowflash21 did his muffler mod basically turns it into the Fabspeed muffler bypass. That might be a bit aggressive for me, so I think I'll just block off the middle chamber and see how it goes.

F87source · 09-11-2021, 08:19 PM

Quote:

Originally Posted by VisualEcho

The way Yellowflash21 did his muffler mod basically turns it into the Fabspeed muffler bypass. That might be a bit aggressive for me, so I think I'll just block off the middle chamber and see how it goes.

Keep us posted!

I might do what you're planning too.

VisualEcho · 09-12-2021, 08:56 AM

Quote:

Originally Posted by F87source

Keep us posted!

I might do what you're planning too.

I will, but a bit more research is in order. I don't want to lose the deep tone of the stock exhaust, so I need to figure out what each section actually does. I know the F80 guys completely block off the perforated section, so that might be the way to go instead of blocking off the middle section, which might be giving us the depth.

VisualEcho · 09-14-2021, 08:55 AM

Just called my exhaust guy, he can do it for under $300, which isn't so bad. He said that he had done one other BMW (not an M2) that way (probably an E92), and the guy didn't end up liking the sound and bought another stock exhaust. He had straight-piped the perforation section.

Since I don't know which section of the muffler is producing which sound, I think I'll skip this mod. More than volume I want control over the pops and crackles, and that's better handled with the tune.

02-22-2021, 11:30 PM	#67
F87source Major General 7240 Rep 7,421 Posts Drives: Bmw M2 Join Date: Aug 2018 Location: . iTrader: (1)	Very interesting. __________________ Click on the link below to see a compiled list of every review I have ever written: https://f87.bimmerpost.com/forums/sh...2#post30368242
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03-29-2021, 06:06 PM	#68
3LiterBeater Second Lieutenant 130 Rep 221 Posts Drives: BMW M2, Porsche 944 Turbo Join Date: Dec 2020 Location: Maryland iTrader: (0)	Wanted to bump this- happen to have the diameter of pipes you used when replacing the OEM pieces? Or if you have the OE measurements. Thanks
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09-11-2021, 06:35 PM	#69
VisualEcho Banned 6629 Rep 4,145 Posts Drives: '18 M2 6MT Join Date: Sep 2019 Location: Missouri iTrader: (1) Garage List 2018 BMW M2 [10.00]	Bumping this thread in search of anyone else that has done this.
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09-11-2021, 07:25 PM	#70
VisualEcho Banned 6629 Rep 4,145 Posts Drives: '18 M2 6MT Join Date: Sep 2019 Location: Missouri iTrader: (1) Garage List 2018 BMW M2 [10.00]	The way Yellowflash21 did his muffler mod basically turns it into the Fabspeed muffler bypass. That might be a bit aggressive for me, so I think I'll just block off the middle chamber and see how it goes. Attached Images
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09-14-2021, 08:55 AM	#73
VisualEcho Banned 6629 Rep 4,145 Posts Drives: '18 M2 6MT Join Date: Sep 2019 Location: Missouri iTrader: (1) Garage List 2018 BMW M2 [10.00]	Just called my exhaust guy, he can do it for under $300, which isn't so bad. He said that he had done one other BMW (not an M2) that way (probably an E92), and the guy didn't end up liking the sound and bought another stock exhaust. He had straight-piped the perforation section. Since I don't know which section of the muffler is producing which sound, I think I'll skip this mod. More than volume I want control over the pops and crackles, and that's better handled with the tune.
	Appreciate 2 F87source7239.50 ///M TOWN16075.50 Quote