Muffler Modification???
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Joined: Sep 2019
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2010 GLK350 4Matic
Muffler Modification???
I have been seeking information regarding replacing the stock muffler on my GLK350, for a muffler such as a Flowmaster. Is there any problems with doing so, will it cause some sort of codes or create an issue with the normal operational functions? I did a search on the website here and have not been able to find any information on this. Any input would be well appreciated, Thank you.
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Joined: Feb 2019
Posts: 68
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From: Ottawa, ON, Canada
2013 GLK350 4Matic; 2010 Audi A4 Quattro; 2004 Yamaha R1
I changed out my factory mufflers AND factory resonators with just a pair of vibrant ultra quiet resonators. Game me the sound I was looking for. Aggressive, throaty and yet civilized if driving normally.
No codes or issues with anything.
No codes or issues with anything.
Senior Member
Joined: Jul 2014
Posts: 422
Likes: 61
From: South East US.
2015 GLK350
Contrary to their name, Flowmaster mufflers don't actually flow well and will probably add more restriction but they will alter the sound of the exhaust.
Don't expect any power gains. The exhaust has already been optimized by the competent Mercedes engineers and the engine computer will adjust around any changes you make. The days of getting power from exhaust modifications went away when fuel injection and engine management computers came onto the scene.
Change your exhaust if you want a different sound. If you want more power then your best bet is to make sure you are current on your maintenance. Or if you are really serious about power you can drop in an AMG V8.
Don't expect any power gains. The exhaust has already been optimized by the competent Mercedes engineers and the engine computer will adjust around any changes you make. The days of getting power from exhaust modifications went away when fuel injection and engine management computers came onto the scene.
Change your exhaust if you want a different sound. If you want more power then your best bet is to make sure you are current on your maintenance. Or if you are really serious about power you can drop in an AMG V8.
Thread Starter
Member
Joined: Sep 2019
Posts: 86
Likes: 7
2010 GLK350 4Matic
Contrary to their name, Flowmaster mufflers don't actually flow well and will probably add more restriction but they will alter the sound of the exhaust.
Don't expect any power gains. The exhaust has already been optimized by the competent Mercedes engineers and the engine computer will adjust around any changes you make. The days of getting power from exhaust modifications went away when fuel injection and engine management computers came onto the scene.
Change your exhaust if you want a different sound. If you want more power then your best bet is to make sure you are current on your maintenance. Or if you are really serious about power you can drop in an AMG V8.
Don't expect any power gains. The exhaust has already been optimized by the competent Mercedes engineers and the engine computer will adjust around any changes you make. The days of getting power from exhaust modifications went away when fuel injection and engine management computers came onto the scene.
Change your exhaust if you want a different sound. If you want more power then your best bet is to make sure you are current on your maintenance. Or if you are really serious about power you can drop in an AMG V8.
I cannot think of any race team that uses a stock muffler system over factory, can you? Flowmaster has been around long enough to be given credit for a less restrictive muffler and has a proven record of that. In fact the design of a Flowmaster is far different then maybe what you are aware of. The days of power gains from exhaust modifications are not over. Sure most automotive engineers have to design a working muffler to suit both performance and sound levels, but they are not given a blank drawing board for straight performance and sacrificing comfortable sound levels. There are small 4 bangers that have bolt on mods that between intake manifolds, air intakes filters with true cold air induction, larger throttle bodies, larger fuel injectors, ceramic coated headers, that achieve a repectful 40+ horsepower gain and even more if they toss in a crane custom cam and valve springs,.
A whole lot of Nascar teams would not agree with your statements on Flowmasters.
In knowing that Mercedes is touchy with all the input the computer systems give feedback into engine management, my question was related to any negative codes that may pop up. As a response is a no,nothing negative code wise, was the value I was seeking, I do not have a long techincal relationship with Mercedes Benz, however since the early 1960's have been involved in the race scene, as an engine builder and carb/supercharger systems dessign and spent my last 26 years of being employed prior to retirement, working at the Chrysler Tech Center, Auburn Hills, Michigan. Mopar Performance teams would get a smile from reading your response,
Junior Member
Joined: Apr 2018
Posts: 30
Likes: 8
2011 GLK350
I cannot think of any race team that uses a stock muffler system over factory, can you? Flowmaster has been around long enough to be given credit for a less restrictive muffler and has a proven record of that. In fact the design of a Flowmaster is far different then maybe what you are aware of. The days of power gains from exhaust modifications are not over. Sure most automotive engineers have to design a working muffler to suit both performance and sound levels, but they are not given a blank drawing board for straight performance and sacrificing comfortable sound levels. There are small 4 bangers that have bolt on mods that between intake manifolds, air intakes filters with true cold air induction, larger throttle bodies, larger fuel injectors, ceramic coated headers, that achieve a repectful 40+ horsepower gain and even more if they toss in a crane custom cam and valve springs,.
A whole lot of Nascar teams would not agree with your statements on Flowmasters.
In knowing that Mercedes is touchy with all the input the computer systems give feedback into engine management, my question was related to any negative codes that may pop up. As a response is a no,nothing negative code wise, was the value I was seeking, I do not have a long techincal relationship with Mercedes Benz, however since the early 1960's have been involved in the race scene, as an engine builder and carb/supercharger systems dessign and spent my last 26 years of being employed prior to retirement, working at the Chrysler Tech Center, Auburn Hills, Michigan. Mopar Performance teams would get a smile from reading your response,
A whole lot of Nascar teams would not agree with your statements on Flowmasters.
In knowing that Mercedes is touchy with all the input the computer systems give feedback into engine management, my question was related to any negative codes that may pop up. As a response is a no,nothing negative code wise, was the value I was seeking, I do not have a long techincal relationship with Mercedes Benz, however since the early 1960's have been involved in the race scene, as an engine builder and carb/supercharger systems dessign and spent my last 26 years of being employed prior to retirement, working at the Chrysler Tech Center, Auburn Hills, Michigan. Mopar Performance teams would get a smile from reading your response,
lol
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Joined: Sep 2019
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2010 GLK350 4Matic
I really am not comparing what a street car will do performance wise to a race car, however the topic relative to a flowmaster muffler to a stock muffler being more restrictive was the root of the topic, Further many street cars that are modded up;do appreciate a less restrictive muffler. And in actual function, the mufflers perform the same on any normal application regardless if a full race or street application in that they are less restrictive. What has been done aside from stock to a vehicle, augments what other modifications are done for overall performance. So as far as the application, if a flowmaster provides a percentage of less restirction and more flow, that is going to be an almost constant value regardless of how much you would have under the hood.
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Senior Member
Joined: Jul 2014
Posts: 422
Likes: 61
From: South East US.
2015 GLK350
I cannot think of any race team that uses a stock muffler system over factory, can you? Flowmaster has been around long enough to be given credit for a less restrictive muffler and has a proven record of that. In fact the design of a Flowmaster is far different then maybe what you are aware of. The days of power gains from exhaust modifications are not over. Sure most automotive engineers have to design a working muffler to suit both performance and sound levels, but they are not given a blank drawing board for straight performance and sacrificing comfortable sound levels. There are small 4 bangers that have bolt on mods that between intake manifolds, air intakes filters with true cold air induction, larger throttle bodies, larger fuel injectors, ceramic coated headers, that achieve a repectful 40+ horsepower gain and even more if they toss in a crane custom cam and valve springs,.
A whole lot of Nascar teams would not agree with your statements on Flowmasters.
In knowing that Mercedes is touchy with all the input the computer systems give feedback into engine management, my question was related to any negative codes that may pop up. As a response is a no,nothing negative code wise, was the value I was seeking, I do not have a long techincal relationship with Mercedes Benz, however since the early 1960's have been involved in the race scene, as an engine builder and carb/supercharger systems dessign and spent my last 26 years of being employed prior to retirement, working at the Chrysler Tech Center, Auburn Hills, Michigan. Mopar Performance teams would get a smile from reading your response,
A whole lot of Nascar teams would not agree with your statements on Flowmasters.
In knowing that Mercedes is touchy with all the input the computer systems give feedback into engine management, my question was related to any negative codes that may pop up. As a response is a no,nothing negative code wise, was the value I was seeking, I do not have a long techincal relationship with Mercedes Benz, however since the early 1960's have been involved in the race scene, as an engine builder and carb/supercharger systems dessign and spent my last 26 years of being employed prior to retirement, working at the Chrysler Tech Center, Auburn Hills, Michigan. Mopar Performance teams would get a smile from reading your response,
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Thread Starter
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Joined: Sep 2019
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2010 GLK350 4Matic
OH NO! Not the worlds colliding? Why on Earth would anyone not want to replace an expensive restrictive stock muffler, that needs replacement, with a lower cost decent quality performance muffler? If it bothers you so much, you can always volunteer to purchased a set of stock mufflers from the Mercedes dealership and ship them to me....not that I would install them, they would make a great conversation attraction for those visiting my garage.Let me know what dealership you will use so I can contact them with my shipping address. Thanks!
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Joined: Sep 2019
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2010 GLK350 4Matic
You see ZERO about my comparing the noise with a performance muffler to a stock one to compose a conclusion of flow from one muffler to the other. Your question borders looking for a response to it so obvious, it is almost sad at best. I could do a flow comparison if I take them off the car and go back to visit the tech center and see what I come up with, but the easier part for me was to simply make a few phone calls to engineers at both Flowmaster and Mercedes to seek what information they could give me on the topic. The muffers on the 350 4 matic are almost exactly like replacement mufflers made byTenneco Industries that manufacture many products (muffler systems) including the well known Walker muffler line and mufflers for automotive production assembly orgininal equipment.
If you have a flat tire, how do you responed to a question of knowing the tire is flat? For the most part, common sense. If you want to make some contact with Mercedes and Flowmaster, and then Tenneco, I am sure they would have no problem educating you on the princples involved with chamber technology and flow wave design so you can have some actual knowledge instead of what you currently have now on the topic. Good luck.
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2010 GLK350 4Matic
On your other "hot rod" if you seek some really great progammable engine management system, check out Mega Squirt. You can obtain some base line programming for what you have to run and then add some values to fine tune which not only can give you some super amounts of horsepower, and also keep things from blowing up on you if you are running some hot turbo set ups. Most likely they will have someone at their tech help center that already has something similar in their personal hot rod so they can share direct knowledge to you.
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Joined: Apr 2018
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2011 GLK350
Congratulations on the brilliant self-own.
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2010 GLK350 4Matic
Senior Member
Joined: Nov 2012
Posts: 379
Likes: 41
From: Jersey Shore
2012 GLK
boy this guy sure is serious about putting cans on a glk lol
You want a “cool” sounding car, buy a sports car.
glks pick up groceries
You want a “cool” sounding car, buy a sports car.
glks pick up groceries
Last edited by B737; Sep 13, 2019 at 07:09 PM.
Thread Starter
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Joined: Sep 2019
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2010 GLK350 4Matic
Thread Starter
Member
Joined: Sep 2019
Posts: 86
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2010 GLK350 4Matic
Where are my stock replacements from the dealership? Please get that taken care of, all my recent visitors that have come over to my garage have been expecting to see the replacement mufflers you are supposed to buy.Please do not tell me you are too cheap to buy them for me. I'll mount a nice custom sign dedicating them as a gift from you and place it right over them so everyone can observe that.
Senior Member
Joined: Nov 2012
Posts: 379
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From: Jersey Shore
2012 GLK
Sure sounds like you want everyone else to solve your “problems”. Since you’re so experienced with so many cars this one should be super easy.
Last edited by B737; Sep 16, 2019 at 06:20 PM.
Thread Starter
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Joined: Sep 2019
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2010 GLK350 4Matic
I've no problems that are not being taken care of but you did make such a fuss about my installing non-stock mufflers to such a point that to have some stock ones would ease the pain you've been suffering knowing someone wants to do an install on their car that does not meet your ill informed approval. So feel free to buy a set, I promise to send you a box of kleenex to catch the tears you're weeping.
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From: South East US.
2015 GLK350
Thread Starter
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Joined: Sep 2019
Posts: 86
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2010 GLK350 4Matic
You did? So far there is nothing you have stated that has any maturity to it, and your continued banter is meaningless. As you have added nothing more then harrassment to my thread, I would suggest you go back and remove/edit your post. I am certain the moderators on this website would agree.
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Joined: Apr 2018
Posts: 4
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From: Boston, MA
MB GLK350 2015
install this . Magnaflow 10791 Universal Exhaust X-Pipe 2.5" Stainless Steel 12" Long . erased resonator box. den put this too. Two 2.25" straight Universal Glasspack Muffler Resonators 23" Long.. something easy! gives you a great sound.
