Our ML500 Exhaust project: Upgraded Muffler / 2nd Cat delete = Exotic V-8 Rumble - Mercedes-Benz Forum
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post #1 of 22 (permalink) Old 06-06-2018, 02:24 PM Thread Starter
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Our ML500 Exhaust project: Upgraded Muffler / 2nd Cat delete = Exotic V-8 Rumble

Hey All:

I'm posting here to hopefully help provide a more precise plan or to suggest alternatives for those wanting / needing guidance on affordable exhaust options for their ML500 or ML320's.

Before taking any action I watched every YouTube video and read every thread on ML exhaust mods / muffler upgrades. Most were helpful, but frequently lacked details on which exact muffler was installed or exactly what factory components were retained or deleted.

This I found frustrating, as I was hoping to have some precision in terms of how to proceed, especially considering my practical limitations on budget, and no desire to have to 'weld in / cut out' numerous models of mufflers to eventually achieve a satisfactory & lasting Upgrade !

Additionally, I also just completed a very satisfactory Exhaust upgrade on my wife's w210 Wagon, with the 3.2 V-6, m112 engine, with a slightly different muffler (a Flowmaster 40 Series) but the same engine that many of you have in your ML320's.

Along the way to this exact ML Exhaust Upgrade outlined below, I did research & conceive of a couple of variations that could also work perfectly well - but as those exist mainly in theory, I won't waste words explaining them, unless some of you reading have a desire to hear more regarding alternatives to my actual exhaust mods.

Enough said, here's our Exhaust Upgrade details:

This "Rumble Performance Muffler" R22583 is built better than it's very modest price might suggest.

I examined it very carefully before installing, and all the welds were correctly made and the interior baffles are well connected to the externally welded muffler case.

It appears this is made by a subsidiary of Magnaflow or AP Exhaust. It's also listed as an AP Exhaust VX2583 Performance Muffler.

And to remove any doubt, it's a 'DUAL INLET, SINGLE OUTLET' design, despite what a couple of commenters suggest. I bet they didn't look inside very carefully, as the bent metal baffles that direct the sound are bent for the sound / hot gas path to go FROM the Dual Inlet side, towards the Single Outlet.

This is also listed as a 'Transverse Dual In' type muffler.

Can this be used in reverse ? Perhaps, but the design is Dual In, Single out.

It turns out a lot of SUV's use the 2 Inlet, 1 Outlet exhaust system layout.

Our 2002 Mercedes ML500 - with the 5.0 litre Benz V-8 does and that is what I got this muffler for, to upgrade the factory MB muffler on our overly quiet ML500.

Our factory muffler was huge, twice the size & 4 times the weight of this much lighter - and quite a bit louder "Rumble Performance" 2 chamber muffler.

But that's what I was after, getting a V-8 rumble at both idle and while driving around, that was audible in the vehicle, but with no irritating drone inside at highway speeds.

After a bit of trial & error I achieved that and am delighted at the exotic Euro / Muscle car sound that makes driving a bit more fun & interesting.

As a warning, I at first deleted our factory resonator (while keeping the MB factory muffler), which gave a nicer but really subtle growl. Then, upon deleting the large MB factory muffler, and installing this Rumble Muffler (aka VX2583), the interior highway drone was just too much !

Back to the exhaust shop to have them Re-install the factory resonator back to it's original spot, just behind this new muffler.

Now, a week & 300 miles later, I'm very happy with the result: A throaty growl that is audible under most driving conditions, slightly audible but controlled under cruise, and no highway drone. It sounds very much like a Dodge Challenger Hemi / 5 Litre Mustang or Audi R8 Sportscar, which was my goal. (Yet well short of anything near obnoxiously loud.)

Also a nice side benefit: 1.5 mpg increase, which combined with a similar 1.5 mpg increase from the prior deletion of my clogged secondary Catalytic converters, means we now get about 19 mpg highway vs 16 mpg before these exhaust mods.

My total cost was minimal: $100 to delete Cats / straightpipe it. $ 50 to install muffler & $50 more to Re-install the factory resonator, plus the super reasonable $23 fo this muffler.

In 6 months of driving, we may save that back in fuel costs alone....thanks for reading - David in East Texas
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post #2 of 22 (permalink) Old 06-06-2018, 02:29 PM Thread Starter
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FYI, those listings are:

https://www.amazon.com/Rumble-R22583.../dp/B01MSNUU7P

and

https://www.amazon.com/AP-Exhaust-Pr...rmance+muffler
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Last edited by 2000 E 320 White Wagon; 06-06-2018 at 03:17 PM. Reason: clarity
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post #3 of 22 (permalink) Old 06-06-2018, 03:28 PM Thread Starter
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Exclamation Some more pics.....thanks David

Here's more pics.

Pic #3 shows the new muffler, but with no resonator installed behind it.

It was only like that for an hour. Test drive revealed to much drone at most RPM / speeds.

So, back to the exhaust shop to have the Original factory resonator re-installed, as seen in the next two pictures.

Now, it has:

1) Secondary Cats deleted ("Straight piped")

2) Upgraded Muffler (this review)

3) Factory resonator

Oops almost forgot:

4) Added a Slanted cut Chrome exhaust tip. The reason for this wasn't just cosmetic. Without it, the edge of the Tailpipe was a bit up & under the rear bumper fascia, and I could sense extra sound resonance due to that.

Adding the tip brought the sound wave out from under the body & more cleanly behind the vehicle.

A very small thing, seemingly, but made a very large improvement indeed.

Plus a chrome tip adds a nice look !
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Last edited by 2000 E 320 White Wagon; 06-06-2018 at 03:42 PM. Reason: Add description
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post #4 of 22 (permalink) Old 06-06-2018, 05:30 PM
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Woot!
Great job, great write up Dave.
with crisp photos too!

What a difference in muffler sizes. wow-za.

So you went and initially popped in the R22583 (too much rumble...) and replaced it with the VX2583, correct?

Post a youtube on the cat growl of this beast so we can hear what we've seen.
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post #5 of 22 (permalink) Old 06-07-2018, 07:42 AM Thread Starter
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Thanks glad you like 'em.

Negative, those are same muffler under different listings.

I first deleted 2nd Cats & MB Resonator (retaining stock muffler tho) = nicer sound but still too quiet.

Then replaced factory muffler with this one, found it sounded great but too much hiway drone.

Had shop add factory Resonator back behind new muffler (same location as before) and, voila, sound is now perfect - throaty V-8 note at idle & WOT, subtle but audible at cruise.

Yes I will post YouTube of layout & sound test.

There are alternatives to this scheme that I discovered along the way.

Happy to share those too.

Cheers - David

Last edited by 2000 E 320 White Wagon; 06-07-2018 at 07:43 PM.
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post #6 of 22 (permalink) Old 06-07-2018, 07:47 PM Thread Starter
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Exclamation Here is the YouTube Video overview of theses mods...

Ok, here is the video version.

I didn't have time to video a 'drive by' to hopefully capture some 'at speed' sound impressions.

But I'll try to shortly....stay tuned.

Cheers - David in East Texas


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post #7 of 22 (permalink) Old 06-07-2018, 09:56 PM
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David,
Great sounding growl. subtle and it opens up quite nicely
Going to look at this setup once I get my other MB to-dos off my list.

Photo of the exhaust tip you chose?? (nudge, nudge...)

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post #8 of 22 (permalink) Old 06-08-2018, 01:05 AM
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Nice. The sliencer on my ML55 is utterly massive too and my also is possibly quieter than I would like. This may be something for me in the future. Thanks for posting. Want to get my dual exit tips on first though.
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post #9 of 22 (permalink) Old 06-08-2018, 03:33 PM Thread Starter
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Question Can you post a picture of this.....thanks David

Quote:
Originally Posted by el ML View Post
Nice. The sliencer on my ML55 is utterly massive too and my also is possibly quieter than I would like. This may be something for me in the future. Thanks for posting. Want to get my dual exit tips on first though.
Yes, I'd be curioius to see that. By Silencer you mean a 'Resonator' - where is it located on the truck ?

And I assume the very rear mounted unit just ahead of Rear bumper with the Dual Tips, that is your Muffler, yes ?

If the resonator is more towards the middle of the car, perhaps just a simple y pipe like a 2 - 2.5" to single 3" replacing it, and just maintain the rear muffler (assuming it's in good shape)

I bet those rear mufflers don't come cheap ! There's lots of options to explore...

Cheers - David in East Texas
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post #10 of 22 (permalink) Old 06-10-2018, 06:07 AM
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Quote:
Originally Posted by 2000 E 320 White Wagon View Post
Yes, I'd be curioius to see that. By Silencer you mean a 'Resonator' - where is it located on the truck ?

And I assume the very rear mounted unit just ahead of Rear bumper with the Dual Tips, that is your Muffler, yes ?

If the resonator is more towards the middle of the car, perhaps just a simple y pipe like a 2 - 2.5" to single 3" replacing it, and just maintain the rear muffler (assuming it's in good shape)

I bet those rear mufflers don't come cheap ! There's lots of options to explore...

Cheers - David in East Texas
I have always just referred to anything like this on the exhaust system, rightly or wrongly, as a "silencer". Maybe a British thing?
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