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Unread 10-15-2013, 02:47 PM   #1
Line58
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Muffler - Does it matter?

The other week my Jeep began sounding like a demolition derby car (really rough, raw sound. Makes a bub bub bub sound when I engine brake). From what I have been told and read it sounds like its a muffler issue. Assuming that this is correct, I have two questions:

First, can driving the Jeep like this damage the cat or engine?

Second, what is the best aftermarket muffler? I understand that an aftermarket muffler isn't going to make a noticeable improvement in how my 2.5 performs, however I don't want to pick one that will make my rig sound like crap either. Any suggestions would be greatly appreciated.

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Unread 10-15-2013, 02:48 PM   #2
bobjp
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You should probably confirm that it's the muffler then worry about what to replace. There's a hole somewhere.
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Unread 10-15-2013, 02:52 PM   #3
sterdest
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It would be pretty easy to verify that there is a hole. And no a muffler isn't really important. The emission laws of your state might require one but all it really does is "muffle" the exhaust sound to make it quieter. And borla makes a very nice one but something cheap would be just as good if you aren't going to replace more. I would look into an edlebrock or something similar.
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Unread 10-15-2013, 02:55 PM   #4
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I would look into a stainless Magnaflow sound great and last a long time.
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Unread 10-20-2013, 10:10 PM   #5
Line58
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Went a head and ordered a Dynomax Turbo muffler. It's about 1/5 the price of the Magnaflow and has good reviews. Are there any draw backs to using just the muffler with the stock tail pipe, as opposed to ordering the Dynomax cat back system?
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Unread 10-20-2013, 11:15 PM   #6
Maverickxeo
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Quote:
Originally Posted by Line58 View Post
Went a head and ordered a Dynomax Turbo muffler. It's about 1/5 the price of the Magnaflow and has good reviews. Are there any draw backs to using just the muffler with the stock tail pipe, as opposed to ordering the Dynomax cat back system?
An aftermarket muffler will just sound different.

In MOST cases, provided the muffler is NOT a restriction (its NOT on the TJ), changing the muffler will do nothing but sound differently.

If you want the catback system, it will change the sound again (being that again, the exhaust on a TJ is NOT restrictive).

If you want a drawback, it could be the sound if you dont like it (too loud, too much drone, etc), otherwise it shouldnt do anything negative.

You MAY even get a SLIGHT increase in power (not enough to make it into a speed demon or anything, but any dyno Ive seen from a TJ exhaust is very minimal).
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Unread 10-21-2013, 10:34 AM   #7
jeepinhokie
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Quote:
Originally Posted by Line58 View Post
Went a head and ordered a Dynomax Turbo muffler. It's about 1/5 the price of the Magnaflow and has good reviews. Are there any draw backs to using just the muffler with the stock tail pipe, as opposed to ordering the Dynomax cat back system?
the dynomax super turbo muffler will do just fine.

though the shape and size might be different than the OEM one, so the tailpipe will have to be modified to fit properly.

which part number did you get?
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Unread 10-21-2013, 11:35 AM   #8
ddecker2010
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It could be your exhaust manifold too since they are known for cracking, just my .02!
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Unread 11-08-2013, 03:31 PM   #9
Line58
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Originally Posted by jeepinhokie View Post
the dynomax super turbo muffler will do just fine.

though the shape and size might be different than the OEM one, so the tailpipe will have to be modified to fit properly.

which part number did you get?
The part number is 17731.
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Unread 11-08-2013, 03:37 PM   #10
Line58
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I finally installed the muffler this morning. I cut off input pipe as close to the muffler as possible and cut the tail pipe flush with the weld on the muffler to maximize the length of pipe in the hopes the Dynomax exhaust would be long enough to reach. It wasn't. Fortunately the Napa down the street carries 14" x 2.25" straight tube. After inserting 7.5" of new tube between the muffler and the pipe from the cat I was able to get everything put together.
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