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-   -   Make your M550i sound like the M850i... (https://www.bimmerfest.com/forums/showthread.php?t=1331201)

modthispny 05-20-2019 10:51 PM

Make your M550i sound like the M850i...
 
https://www.youtube.com/watch?v=YSMtRFtlghY

https://www.youtube.com/watch?v=eAHWXw0hA20

https://www.youtube.com/watch?v=1MMZFw7pYi4


So the M550i has 4 total resonators, right in the middle of the exhaust. Also would like to note the entire exhaust system is 1 piece only, from the turbo-back all the way to the exhaust tips, I was pretty shocked to see this when my car was under the lift. As I wanted something louder without changing the entire exhaust, I had a local shop remove all 4 of the resonators by replacing it with a straight pipe. A simple $160 job.

The car sounds much better, much much better. In sport plus it crackles and pops and backfires and is really addicting, it's really how the car should have sounded and is pretty loud and deep, I love it. Videos don't do it any justice; the exhaust tone is very deep.

So after looking at M850i videos for the heck of it, I realized that the M850i sounds similar to my car now and wondered if BMW just omitted the resonators for the M850i. When I went to the dealer today to pick up my car, I saw an M850i and looked under it, and only saw 2 resonators...

Definitely a "mod" I suggest for anybody with an M550i that wants the car to sound significantly better.

bklyn550 06-12-2019 12:52 PM

Iím hesitant to do this because my car is leased. Would love more sound


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modthispny 06-13-2019 03:56 PM

Quote:

Originally Posted by bklyn550 (Post 13026097)
Iím hesitant to do this because my car is leased. Would love more sound


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just weld it back in when you return it..shouldn't be an issue.

bklyn550 06-13-2019 08:11 PM

Quote:

Originally Posted by modthispny (Post 13027309)
just weld it back in when you return it..shouldn't be an issue.



Iím gonna check it out. I mean for that money itís a lot more cost effective than the Dinan exhaust at 2600


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Moewron 06-14-2019 09:14 AM

So that sounds awesome for a loud-exhaust, hard-chargin' car, but how does it sound with regular driving, regular mode? One of the reasons the m550 appealed to me over, say, an AMG or the S6 is that it was/could be quiet, understated, kinda stealthy for a high-performance car. I love how that sounds, but I wouldn't want a car that sounds like that all the time.

modthispny 06-14-2019 10:38 AM

Quote:

Originally Posted by Moewron (Post 13027879)
So that sounds awesome for a loud-exhaust, hard-chargin' car, but how does it sound with regular driving, regular mode? One of the reasons the m550 appealed to me over, say, an AMG or the S6 is that it was/could be quiet, understated, kinda stealthy for a high-performance car. I love how that sounds, but I wouldn't want a car that sounds like that all the time.

in comfort mode its a little louder, but definitely still falls under the "quiet" category though.
It really only sounds like this in sport +.

bklyn550 06-17-2019 03:02 PM

What do I need to ask for at the muffler shop? Resonator delete? Also Iím assuming keep whatever was cut out to return the car to stock


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modthispny 06-17-2019 03:51 PM

Quote:

Originally Posted by bklyn550 (Post 13030073)
What do I need to ask for at the muffler shop? Resonator delete? Also Iím assuming keep whatever was cut out to return the car to stock


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yea - once the car is on the lift it's pretty self explanatory. they chop off the center with the resonators and replace with straight pipes.

bklyn550 06-17-2019 04:36 PM

Quote:

Originally Posted by modthispny (Post 13030133)
yea - once the car is on the lift it's pretty self explanatory. they chop off the center with the resonators and replace with straight pipes.



Thank u for the quick reply.


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Moewron 06-18-2019 10:13 AM

How would one go about selecting a reputable shop to do this work?

And, would it have any effect on the warranty?

gtfish 06-18-2019 01:49 PM

Just go to any muffler shop. They should all be able to do this.
It is post cat so it shouldn't have any bearing on warranty, no different than doing a cat back exhaust

bklyn550 06-20-2019 06:42 AM

Quote:

Originally Posted by gtfish (Post 13030853)
Just go to any muffler shop. They should all be able to do this.

It is post cat so it shouldn't have any bearing on warranty, no different than doing a cat back exhaust



Gonna give it a shot today. Thanks for the reply. Excited to hear the difference.


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Moewron 06-20-2019 08:54 AM

Great! Let me know what you think. Seriously considering this, provided it remains relatively subdued in Comfort/Adaptive mode.

bklyn550 06-20-2019 11:03 AM

Quote:

Originally Posted by Moewron (Post 13032541)
Great! Let me know what you think. Seriously considering this, provided it remains relatively subdued in Comfort/Adaptive mode.



Scheduled to go in Friday Iíll let u know.


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modthispny 06-21-2019 10:12 AM

it's a bit louder in comfort mode when cruising and under acceleration, but the trade-off is definitely worth it.

bklyn550 06-21-2019 11:58 AM

1 Attachment(s)
Attachment 855525 another few mins and I will see whatís up. Excited to hear the difference.


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modthispny 06-21-2019 12:24 PM

Quote:

Originally Posted by bklyn550 (Post 13033525)
Attachment 855525 another few mins and I will see whatís up. Excited to hear the difference.


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wow haha! you will love it. pop it in sport + and give it some revs.

bklyn550 06-21-2019 02:59 PM

Quote:

Originally Posted by modthispny (Post 13033539)
wow haha! you will love it. pop it in sport + and give it some revs.



I am so happy I did this the car Sounds great. Under regular driving in comfort mode there is not much difference in sound itís a little bit more bass like. But when you put that car in sports plus and get on that engine it sounds amazing. Once again not loud enough to be obnoxious but it sounds like it was meant to be.


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modthispny 06-21-2019 03:07 PM

Quote:

Originally Posted by bklyn550 (Post 13033717)
I am so happy I did this the car Sounds great. Under regular driving in comfort mode there is not much difference in sound itís a little bit more bass like. But when you put that car in sports plus and get on that engine it sounds amazing. Once again not loud enough to be obnoxious but it sounds like it was meant to be.


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glad you like it.

the car from outside sounds very deep, and the overrun and burbles sound really good on the upshift/downshift especially if the sound echos between buildings.

bklyn550 06-21-2019 05:21 PM

Quote:

Originally Posted by modthispny (Post 13033725)
glad you like it.



the car from outside sounds very deep, and the overrun and burbles sound really good on the upshift/downshift especially if the sound echos between buildings.



Yes with the windows down even in comfort when u get on it you notice it.


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bklyn550 06-21-2019 05:22 PM

1 Attachment(s)
Attachment 855575 kiss these babies goodbye lol and you will enjoy the sound of the car so much more.


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C7Z51 06-25-2019 11:09 AM

I want to have this done. do you have before and after pics you could post? I know you said it would be obvious but I'd like to be sure.

Moewron 06-25-2019 12:24 PM

It'll only look obvious if you're laying underneath the car looking up...

bklyn550 06-28-2019 08:41 PM

Quote:

Originally Posted by C7Z51 (Post 13036883)
I want to have this done. do you have before and after pics you could post? I know you said it would be obvious but I'd like to be sure.



Iíll try to take some pictures I didnít take any before but assume before is what your setup looks like.


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bklyn550 07-07-2019 01:43 PM

1 Attachment(s)
Finally had a minute to take some picsAttachment 857317


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