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Old 01-13-2011, 05:39 AM
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Custom muffler on HEMI MDS - Problems?

I have been tempted by the following videos about the MagnaFlow 11226 muffler for our Hemis.





However I have read about MDS feeling getting worst when using custom exhaust systems, or suffering "drone" when in 4 cylinders mode.

BTW, I'm actually quite bothered when MDS kicks in & out with original mufflers!

Can someone witness this? Do you believe just replacing the muffler would have bad effects?

What else needs to be replaced besides the two mufflers? BTW the mufflers will be identical?
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Old 01-13-2011, 08:39 AM
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Re: Custom muffler on HEMI MDS - Problems?

it does make it worse if the exhaust is TOO clean. i beleive if you leave the reso in you can change the muffler. without the reso is the worst for the MDS.
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Old 01-13-2011, 08:45 AM
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Re: Custom muffler on HEMI MDS - Problems?

What's the "reso"? can you clarify?
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Old 01-13-2011, 08:51 AM
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The reso is the resonater......

If you remove it you will have drone

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Old 01-13-2011, 08:57 AM
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Re: Custom muffler on HEMI MDS - Problems?

Two questions more:

1) Do you think this "resonator" is left on, in the linked videos?

2) Do I only need to buy two mufflers, leaving the rest of the original exhaust system on?

Full-grade rookie here, sorry for asking so simple questions!
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Old 01-13-2011, 12:40 PM
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Re: Custom muffler on HEMI MDS - Problems?

Yes the resonator is the right be for the tailpipe (you can see it when he is waiting for the guy to rev the engine). It almost looks like another muffler! You can just replace the huge stock muffler with your magnaflow. You will only need one muffler!

My problem, fwiiw, I chopped from the muffler back and installed a flowmaster 44 that i had laying around and 3" pipe all the way back. Sounds throaty, but I'm getting the horrible drone. So I'm trying to see if there is a aftermarket resinator to purchase, other wise I'll have to buy a stock one!
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Old 01-13-2011, 12:58 PM
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Re: Custom muffler on HEMI MDS - Problems?

FYI - I have a 22" Borla for a 5.9 Durango I installed and removed the reso...no drone and a great sound @ WOT! It is quiet under normal driving conditions...I can still hear/feel the MDS, but no highway drone or annoyance issues.
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Old 01-13-2011, 02:07 PM
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Re: Custom muffler on HEMI MDS - Problems?

Quote:
Originally Posted by ech0sh4y View Post
You will only need one muffler!
!
In the video you can clearly see the Magnaflow logo on the "middle" muffler. Is this one the one to be changed?

Edit: it looks like there are two mufflers, one in the middle and one on the "tail". I suspect the last one being the resonator, and the middle one the magnaflow. Correct?
That would explain why I need one muffler only.. correct?
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Old 01-13-2011, 02:50 PM
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Re: Custom muffler on HEMI MDS - Problems?

Correct and correct
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Old 01-14-2011, 04:05 AM
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Re: Custom muffler on HEMI MDS - Problems?

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Old 01-14-2011, 05:05 AM
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Re: Custom muffler on HEMI MDS - Problems?

Back again!

- Can i change the muffler by my self, ie crawling underneath the car? Special keys required?

- Will the engine need a special tuning for this change?

- Any well known drawbacks, apart from disliking the sound (you never know, you can't simply judge from one video, however this muffler is so cheap I can bare the risk of throwing it a away!). Maybe decreased MPG?
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Old 01-15-2011, 03:25 AM
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Re: Custom muffler on HEMI MDS - Problems?

Unless the new muffler is exactly the same size and configuration as the stock muffler, you will need to be able to bend exhaust pipe and do some welding to put the new muffler in.
Tuning is not necessary.
No known drawbacks.
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