BMW M3 and M4 - The Icons
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
G80 BMW M3 and M4 General Topics M3 / M4 Photos, Videos, Builds

Post Reply
 
Thread Tools Search this Thread
      05-13-2021, 01:29 PM   #1
Vic55
Major General
Vic55's Avatar
4285
Rep
6,165
Posts

Drives: 2020 M8 Gran Coupe Competition
Join Date: Jul 2009
Location: THE Orange County

iTrader: (9)

Video and Pics of Dual Resonator Removal - 2021 G80 M3

BIMMERPOST
     Featured on BIMMERPOST.com
My apologies up front for doing lame teasers in multiple threads that were not my own across this board.

I have removed multiple resonators for several S63 Tu cars Ive owned and many Benzes, Audis, and even a Bentley with good results. My most recent resonator pull was on my M8 GC Comp and I gained a decent amount of decibels without much, if any, tonal change.

I picked up this G80 not too long ago and felt it was too quiet in stock format even with the valves open so I took it over to my local muffler guy who Ive used for years and pulled both resonators off. From another member here, I learned that there were two larger suitcases and pulling just the primary would not yield enough gains for me. YMMV.

So I pulled both (post cats) and there is definitely a decibel or loudness gain. I say under light throttle the gain is circa 20% and under WOT maybe 35% or so. Based on my live ear, the exhaust tones remained the same where there is a bass(y) tone at cold start and then a more higher pitched tone up top.

Mind you this process cost me 300 dollars all in and is reversible in nature. The video does have some higher rpm (7k) rasp but in reality I dont hear it via regular and spirited driving but you will hear it in the video from a stand still because I pushed the revs all the way up vs just leaving it maxed at 5 to 6k. For me the increase in growl and roar is there but for those who hate burbles, its not too bad. There are heightened bangs on rapid upshifts too.

Here are some pics and the vid:

stock set up



Post removal



Ugly secondary cats (Ill pull this next)





Cell Phone Videos (apologies for the bumper mount resolution)



__________________
2020 Audi R8 V10 Performance Suzuka Gray
2020 BMW M8 Gran Coupe Competition Black Sapphire Metallic
2018 Porsche GTS Cabriolet Carmine Red
2016 AMG GTS Edition 1 Selenite Grey
2012 Mercedes Benz C63 AMG Black Series Obsidian Black
Appreciate 21
      05-13-2021, 01:50 PM   #2
LBbluem2
Captain
LBbluem2's Avatar
805
Rep
902
Posts

Drives: BMW M2 comp
Join Date: Jun 2019
Location: Dana Point

iTrader: (0)

What do you think of adding an x pipe in there?
Appreciate 1
Bee Pee1525.00

      05-13-2021, 01:53 PM   #3
Vic55
Major General
Vic55's Avatar
4285
Rep
6,165
Posts

Drives: 2020 M8 Gran Coupe Competition
Join Date: Jul 2009
Location: THE Orange County

iTrader: (9)

Quote:
Originally Posted by LBbluem2 View Post
What do you think of adding an x pipe in there?
its an option but Ive never done anything but straights ..... Ill be the guinea pig though
__________________
2020 Audi R8 V10 Performance Suzuka Gray
2020 BMW M8 Gran Coupe Competition Black Sapphire Metallic
2018 Porsche GTS Cabriolet Carmine Red
2016 AMG GTS Edition 1 Selenite Grey
2012 Mercedes Benz C63 AMG Black Series Obsidian Black
Appreciate 1
LBbluem2805.00

      05-13-2021, 01:53 PM   #4
GOLFFRR
GOLFFRR's Avatar
8391
Rep
25,668
Posts

Drives: GOLFFRR cart
Join Date: Mar 2009
Location: we sell BMWs to "ALL" US states

iTrader: (4)

That sounds pretty good bud. I like it
__________________

BEFORE YOU BUY YOUR NEXT BMW, PM ME FIRST WE CAN HOOK YOU UP!
Jimmy Miller:jmiller@stevethomasbmw.com Cell:805-509-2048
If you have any issues getting a hold of Jimmy M PLEASE PM me, I'm available everyday till 545pm!
Appreciate 0
      05-13-2021, 01:55 PM   #5
Vic55
Major General
Vic55's Avatar
4285
Rep
6,165
Posts

Drives: 2020 M8 Gran Coupe Competition
Join Date: Jul 2009
Location: THE Orange County

iTrader: (9)

Quote:
Originally Posted by GOLFFRR View Post
That sounds pretty good bud. I like it
Its better in person (so fucking cliche) as the cell phone is only as good as the mic attached
__________________
2020 Audi R8 V10 Performance Suzuka Gray
2020 BMW M8 Gran Coupe Competition Black Sapphire Metallic
2018 Porsche GTS Cabriolet Carmine Red
2016 AMG GTS Edition 1 Selenite Grey
2012 Mercedes Benz C63 AMG Black Series Obsidian Black
Appreciate 2
GOLFFRR8390.50

      05-13-2021, 03:40 PM   #6
BSM_G808
Private First Class
84
Rep
150
Posts

Drives: 2021 BSM M3C
Join Date: Mar 2014
Location: Seattle

iTrader: (0)

Thanks for this man! It is hard to tell the actual sound from a video. I am sure it sounds nice in person.

Any noticeable drone at highway speeds?
Appreciate 1
Vic554285.00

      05-13-2021, 03:45 PM   #7
Vic55
Major General
Vic55's Avatar
4285
Rep
6,165
Posts

Drives: 2020 M8 Gran Coupe Competition
Join Date: Jul 2009
Location: THE Orange County

iTrader: (9)

Quote:
Originally Posted by BSM_G808 View Post
Thanks for this man! It is hard to tell the actual sound from a video. I am sure it sounds nice in person.

Any noticeable drone at highway speeds?
Oh good question that I didnt list an answer to.... no drone to me albeit a very subjective measure.
__________________
2020 Audi R8 V10 Performance Suzuka Gray
2020 BMW M8 Gran Coupe Competition Black Sapphire Metallic
2018 Porsche GTS Cabriolet Carmine Red
2016 AMG GTS Edition 1 Selenite Grey
2012 Mercedes Benz C63 AMG Black Series Obsidian Black
Appreciate 0
      05-13-2021, 04:27 PM   #8
MJO316
Private First Class
MJO316's Avatar
United_States
94
Rep
169
Posts

Drives: '15 M6 '17 i8
Join Date: Dec 2020
Location: NY

iTrader: (0)

Sounds great.

The member with frozen deep grey M4 says he is doing secondary catless with the resonator removal. Will be done this month.

I'm waiting to see results.

Hoping to order in July.
Appreciate 1
Vic554285.00

      05-13-2021, 04:29 PM   #9
Vic55
Major General
Vic55's Avatar
4285
Rep
6,165
Posts

Drives: 2020 M8 Gran Coupe Competition
Join Date: Jul 2009
Location: THE Orange County

iTrader: (9)

Quote:
Originally Posted by MJO316 View Post
Sounds great.

The member with frozen deep grey M4 says he is doing secondary catless with the resonator removal. Will be done this month.

I'm waiting to see results.

Hoping to order in July.
based on how the secondaries look- Im going to wait for a company to develop some like EVR which I used on my M8. Im not sure I would have my shop do a straight pipe on the cats.
__________________
2020 Audi R8 V10 Performance Suzuka Gray
2020 BMW M8 Gran Coupe Competition Black Sapphire Metallic
2018 Porsche GTS Cabriolet Carmine Red
2016 AMG GTS Edition 1 Selenite Grey
2012 Mercedes Benz C63 AMG Black Series Obsidian Black
Appreciate 0
      05-13-2021, 08:43 PM   #10
GOLFFRR
GOLFFRR's Avatar
8391
Rep
25,668
Posts

Drives: GOLFFRR cart
Join Date: Mar 2009
Location: we sell BMWs to "ALL" US states

iTrader: (4)

Quote:
Originally Posted by Vic55 View Post
Its better in person (so fucking cliche) as the cell phone is only as good as the mic attached
I feel ya, vids never do it justice
__________________

BEFORE YOU BUY YOUR NEXT BMW, PM ME FIRST WE CAN HOOK YOU UP!
Jimmy Miller:jmiller@stevethomasbmw.com Cell:805-509-2048
If you have any issues getting a hold of Jimmy M PLEASE PM me, I'm available everyday till 545pm!
Appreciate 1
Vic554285.00

      05-13-2021, 10:01 PM   #11
CanuckM
Second Lieutenant
304
Rep
280
Posts

Drives: 991.2 C4S | F87 M2C
Join Date: Mar 2021
Location: Canada

iTrader: (0)

Thanks for sharing Vic. Will probably follow suit and do this next week.
Appreciate 1
Vic554285.00

      05-13-2021, 10:23 PM   #12
chicagofan00
Colonel
chicagofan00's Avatar
United_States
2109
Rep
2,603
Posts

Drives: X3 M40i
Join Date: Feb 2011
Location: Phoenix

iTrader: (0)

Garage List
I think it sounds really good and might be something I would do.

I'm inclined to wait to see what Akrapovic and Eisenmann will have to offer but there is definitely going to be a massive delta in price for those options compared to just going with a res delete.
__________________
Incoming - 2021 G80 ///M3 Competition in Twilight Purple. Order submitted - 3/13, Allocation obtained - 3/20, Individual requested - 4/9, Individual approved - 4/15. Build will be July or August as a 2022 model.
Current - 2019 G01 X3 ///M40i in Glacier Silver w/Cerium Grey trim delete, gloss black Roundels, gloss black badges, gloss black rear diffuser, gloss black rear spoiler, 3D Design carbon fiber front lip, and floating wheel center caps
Past- 2005 E53 X5 3.0i; 2008 E92 335i
Appreciate 1
Vic554285.00

      05-13-2021, 10:43 PM   #13
ACremona22
First Lieutenant
ACremona22's Avatar
177
Rep
324
Posts

Drives: 2021 BMW M3 Comp
Join Date: Dec 2020
Location: Chicago

iTrader: (0)

I want to like this, and I think I do. In just worried about how that higher end raspiness actually sounds. Was hoping it would be deeper.

I may even feel the B58 sounds better than the S58 still.
__________________
Current: 2021 M3 Competition, Tanzanite/Tartufo
Previous: 2021 M340i, Dravit Grey/Cognac
Appreciate 2
      05-13-2021, 10:43 PM   #14
F80SRT
Private First Class
72
Rep
130
Posts

Drives: '17 X5M/'20 X3MComp
Join Date: Oct 2017
Location: PARKER, CO

iTrader: (0)

Thanks for sharing. I'm starting my mod's list now (pre-AWD order). This is now on it.
Appreciate 0
      05-14-2021, 12:48 AM   #15
Kevin_The_Clean1
Captain
Kevin_The_Clean1's Avatar
United_States
331
Rep
830
Posts

Drives: 2011 335i M-Sport, 2021 X3 MC
Join Date: Jan 2016
Location: Campbell, CA

iTrader: (8)

I need to hear some driving video with the engine under full load to accurately asses the true sound. But sounds much better overall.
__________________
2011 335i M-Sport - Daily Driver
2017 M2 - SOLD
2021 X3 M Competition - Finally arrived ///
Appreciate 2
Vic554285.00
Jproos213.50

      05-14-2021, 01:08 AM   #16
RugbyBro
Major
RugbyBro's Avatar
2561
Rep
1,301
Posts

Drives: M4
Join Date: Jun 2019
Location: Bay Area

iTrader: (0)

As LBbluem2 suggested, you should try an x or h pipe to merge the pulses. BMW has historically done this in the resonator on their twin turbo engines. Unmerged it can sound farty/raspy/tinny; an x or h will not decrease volume but likely improve the exhaust tone.
__________________
F82 - Current
Appreciate 4
      05-14-2021, 11:04 AM   #17
dave12285
Private First Class
88
Rep
141
Posts

Drives: BMW M4 CS
Join Date: Aug 2009
Location: San Diego

iTrader: (0)

Quote:
Originally Posted by Kevin_The_Clean1 View Post
I need to hear some driving video with the engine under full load to accurately asses the true sound. But sounds much better overall.
I was going to say the same thing. Full load sound clips would be very helpful. Sounds good so far though.
Appreciate 0
      05-14-2021, 11:39 AM   #18
ACremona22
First Lieutenant
ACremona22's Avatar
177
Rep
324
Posts

Drives: 2021 BMW M3 Comp
Join Date: Dec 2020
Location: Chicago

iTrader: (0)

Quote:
Originally Posted by RugbyBro View Post
As LBbluem2 suggested, you should try an x or h pipe to merge the pulses. BMW has historically done this in the resonator on their twin turbo engines. Unmerged it can sound farty/raspy/tinny; an x or h will not decrease volume but likely improve the exhaust tone.
This would be VERY interesting and definitely has my attention…
__________________
Current: 2021 M3 Competition, Tanzanite/Tartufo
Previous: 2021 M340i, Dravit Grey/Cognac
Appreciate 0
      05-15-2021, 09:10 AM   #19
997CABOVA
Second Lieutenant
45
Rep
206
Posts

Drives: F10 M5
Join Date: Feb 2011
Location: Rhode Island

iTrader: (1)

What would the X Pipe do exactly???
__________________
21 M3C Brooklyn Grey/Silverstone Carbon Bucket SeatsExec PackParking Assist825M Bi Color Wheels
Appreciate 0
      05-15-2021, 09:19 AM   #20
LBbluem2
Captain
LBbluem2's Avatar
805
Rep
902
Posts

Drives: BMW M2 comp
Join Date: Jun 2019
Location: Dana Point

iTrader: (0)

Quote:
Originally Posted by 997CABOVA View Post
What would the X Pipe do exactly???
Merges the pulses and essentially increases the "frequency" effectively improving pitch
Appreciate 2
Reedomn648.00

      05-15-2021, 09:34 AM   #21
Vic55
Major General
Vic55's Avatar
4285
Rep
6,165
Posts

Drives: 2020 M8 Gran Coupe Competition
Join Date: Jul 2009
Location: THE Orange County

iTrader: (9)

Quote:
Originally Posted by LBbluem2 View Post
Merges the pulses and essentially increases the "frequency" effectively improving pitch
So for my specific situation, just make an X pipe where Ive outlined the arrows??
Attached Images
 
__________________
2020 Audi R8 V10 Performance Suzuka Gray
2020 BMW M8 Gran Coupe Competition Black Sapphire Metallic
2018 Porsche GTS Cabriolet Carmine Red
2016 AMG GTS Edition 1 Selenite Grey
2012 Mercedes Benz C63 AMG Black Series Obsidian Black
Appreciate 1
      05-15-2021, 10:08 AM   #22
LBbluem2
Captain
LBbluem2's Avatar
805
Rep
902
Posts

Drives: BMW M2 comp
Join Date: Jun 2019
Location: Dana Point

iTrader: (0)

Quote:
Originally Posted by Vic55 View Post
Quote:
Originally Posted by LBbluem2 View Post
Merges the pulses and essentially increases the "frequency" effectively improving pitch
So for my specific situation, just make an X pipe where Ive outlined the arrows??
Yeah I think that would be a perfect spot
Appreciate 2
Vic554285.00
Reedomn648.00

Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 06:57 AM.




g80
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST