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      07-30-2020, 08:10 AM   #1
Focal204
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Performance Exhaust

Good morning. I am looking for performance parts for my 2020 Z4 M40i. I am finding them much more difficult to find than my 2016 F80 m3.


Specifically looking for exhaust options.

Only been able to find:

https://ind-distribution.com/collect...e-set-titanium

Has anyone on here changed their exhaust yet?
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      07-30-2020, 09:40 AM   #2
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I have a 30i, and I was in the same position as you. I couldn't find much at all for an exhaust, so I ended up opting for a catless downpipe from ER that sounds incredible. Costed $350+ install.

But to answer your question, Manhart has an exhaust for the m40i, as does REMUS , here are the links.


https://www.manhart-performance.de/s...-valve-control


https://remus.eu/blog/remus-product-...ation-18-2019/

Hope this helps!
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      07-31-2020, 06:26 PM   #3
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Put the M340i/Supra catted downpipe on mine.
No CEL!


https://store.activeautowerke.com/co...atted-downpipe
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      08-01-2020, 07:56 PM   #4
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Supra catless DP on mine, rest is stock. Exhaust screams now. I still wanna mod the rest of the exhaust, but I'm happy where it sounds right now. Might go sport cat if I mod the rest of the exhaust just so it doesn't drone with a (almost) straight pipe
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      08-03-2020, 06:01 PM   #5
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Quote:
Originally Posted by Joe240 View Post
Supra catless DP on mine, rest is stock. Exhaust screams now. I still wanna mod the rest of the exhaust, but I'm happy where it sounds right now. Might go sport cat if I mod the rest of the exhaust just so it doesn't drone with a (almost) straight pipe
would love to hear it! in comfort mode, sport and sport plus. if you get bored in the pandemic and need to make home movies, sure many here would love to watch - I mean hear!
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      08-05-2020, 11:03 AM   #6
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Quote:
Originally Posted by MG 228i View Post
Put the M340i/Supra catted downpipe on mine.
No CEL!


https://store.activeautowerke.com/co...atted-downpipe
I'm actually interested in this. Did the exhaust sound change/increase at all? I would love to increase the volume little bit without throwing up CEL!!
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      08-05-2020, 11:59 AM   #7
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Quote:
Originally Posted by ToysArs View Post
I'm actually interested in this. Did the exhaust sound change/increase at all? I would love to increase the volume little bit without throwing up CEL!!
Yup, catted downpipe would be the best bet.
Driving normal it sounds the same, except the burbles are louder but still OEM sounding and not obnoxious.

No drone on the freeway. No CEL. But I think I can go louder, maybe the CG Precision catted downpipe would be a little louder or just remove the resonator(s) as well.
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      05-23-2022, 04:51 PM   #8
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Quote:
Originally Posted by ArmnStig View Post
I have a 30i, and I was in the same position as you. I couldn't find much at all for an exhaust, so I ended up opting for a catless downpipe from ER that sounds incredible. Costed $350+ install.

But to answer your question, Manhart has an exhaust for the m40i, as does REMUS , here are the links.


https://www.manhart-performance.de/shop/en/manhart-slip-on-exhaust-bmw-g29-z4-with-valve-control


https://remus.eu/blog/remus-product-information-18-2019/

Hope this helps!

Do you have a link to the ER DP you're using? I have a 30i also and would like to improve exhaust sound. Looking for no CEL also.
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      05-24-2022, 11:02 AM   #9
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Does anyone tried Supra aftermarket mufflers on Z4? I realize the tips are different and might required to be cut but I wonder if the rest would be ok with Z4.
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      03-24-2023, 06:42 AM   #10
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Quote:
Originally Posted by ArmnStig View Post
I have a 30i, and I was in the same position as you. I couldn't find much at all for an exhaust, so I ended up opting for a catless downpipe from ER that sounds incredible. Costed $350+ install.

But to answer your question, Manhart has an exhaust for the m40i, as does REMUS , here are the links.


https://www.manhart-performance.de/s...-valve-control


https://remus.eu/blog/remus-product-...ation-18-2019/

Hope this helps!
hello I have a 2023 Z4 Lci 30i
I want to cancel middle silencer and resonator
Do you need any software? is there an engine fault code?
waiting for your return thank you
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      03-30-2023, 11:06 AM   #11
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I changed mine about 6times by now
It's finally getting to a point where i like it again, there's still a bit of drone in the low rpms, but not as bad as before


https://photos.app.goo.gl/MCzmK8fTsYJZHA7w6
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      03-30-2023, 12:11 PM   #12
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Quote:
Originally Posted by RavenGX View Post
I changed mine about 6times by now
It's finally getting to a point where i like it again, there's still a bit of drone in the low rpms, but not as bad as before


https://photos.app.goo.gl/MCzmK8fTsYJZHA7w6
It sounds very nice!
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      03-30-2023, 03:51 PM   #13
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thanks!
It took a lot of trial and error. All it needs now is a way to close the exhaust valves manually again. I saw an article or video a while back where you could add a screen to open and close them with bimmercode, i think i'll try that one of these days
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      10-14-2023, 03:48 AM   #14
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pls check this Z4 G29 M40i B58 valve catback exhaust system video

any inquiry just feel free to contact me: info@res-exhaust.com

*Bimmer guys will have special discount
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      10-14-2023, 10:38 AM   #15
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Anyone have any idea how much power a catted downpipe adds?
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      02-09-2024, 01:59 PM   #16
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Quote:
Originally Posted by Focal204 View Post
Good morning. I am looking for performance parts for my 2020 Z4 M40i. I am finding them much more difficult to find than my 2016 F80 m3.


Specifically looking for exhaust options.

Only been able to find:

https://ind-distribution.com/collect...e-set-titanium

Has anyone on here changed their exhaust yet?
Same here, saw the Remus on ebay but not sure
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      02-09-2024, 02:12 PM   #17
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Quote:
Originally Posted by MG 228i View Post
Put the M340i/Supra catted downpipe on mine.
No CEL!


https://store.activeautowerke.com/co...atted-downpipe
Did you get the Supra (m440) Gxx Catted one and works on the Z4?
you didnt ask if the exhaust as well ?
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      02-09-2024, 02:23 PM   #18
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Quote:
Originally Posted by RES EXHAUST SYSTEM View Post
pls check this Z4 G29 M40i B58 valve catback exhaust system video

any inquiry just feel free to contact me: info@res-exhaust.com

*Bimmer guys will have special discount
No price !!!
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      02-09-2024, 02:25 PM   #19
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Quote:
Originally Posted by RavenGX View Post
thanks!
It took a lot of trial and error. All it needs now is a way to close the exhaust valves manually again. I saw an article or video a while back where you could add a screen to open and close them with bimmercode, i think i'll try that one of these days
Permanently Open?
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      02-10-2024, 12:53 AM   #20
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yeah it was programmed always open, used to have a valve controller, but ther tuner said it interfered with the tuning software so he pulled it out.

I changed it up once more, back on the stock (emptied) muffler and catless downpipe, sounds a million times better in my opinion, but it's a bit too loud.

I currently have the valve running again in OEM mode so it's a bit more quiet in eco mode, still roars pretty hard when starting at the lights but its quiet once at speed. My work is next to a police station, and i start at 6am so i have to be a bit careful with my volume
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