2.5 Muffler - JeepForum.com
 
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post #1 of 11 Old 12-18-2015, 11:39 PM Thread Starter
jeepwrangler89
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1989 YJ Wrangler 
 
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2.5 Muffler

So after finally deciding to look into the obnoxious rattle coming from the rear of my jeep, I realized that I need to replace my muffler AGAIN. I've already replaced it twice. The first one was the original and was rusted out, the seam on the side of the next one broke, and the internals on the current muffler have broken. I would really love to get one that doesn't need to be replaced every two years. Are any specific brands stronger or more durable than others? Any help would be greatly appreciated!

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post #2 of 11 Old 12-18-2015, 11:50 PM
rustisexpected
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I have run dynomax mufflers on all of my Jeeps and have been very happy with them. 70k miles on my last DD XJ and it was still together and didn't get terribly loud with age. My most current build I used a Thrush to save a few bucks. But I can not speak for its longevity since I have not put 50 miles on it since its install.

Rusty's build thread - http://www.jeepforum.com/forum/f22/project-jermey-1806881/
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post #3 of 11 Old 12-19-2015, 12:00 AM
baritone_mike
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I put a Dynomax on mine last year and it is still good, but we don't have salt. I also put a Magnaflow catalytic converter on it at the same time, it was a little loud at first but it seems to have quite down over time or at least became a warmer tone.

The only reason I bought it was that it was the cheapest non-crush tube cat back I could find and my stock one was very holy.

˙ɹǝʌo ɹǝʇndɯoɔ ɹnoʎ dılɟ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı
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post #4 of 11 Old 12-19-2015, 05:09 PM
bruinjeeper
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Quote:
Originally Posted by baritone_mike View Post
I put a Dynomax on mine last year and it is still good, but we don't have salt. I also put a Magnaflow catalytic converter on it at the same time, it was a little loud at first but it seems to have quite down over time or at least became a warmer tone.

The only reason I bought it was that it was the cheapest non-crush tube cat back I could find and my stock one was very holy.
same setup here.

magnaflo ultra flow cat + dynomax super turbo on a 2.5L. i also wemt full headers on it - so i think that makes it a bit louder than it would be.

been only about 8000 miles. but works well. throaty growl tone

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.

~YJOTM MAY '16~
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post #5 of 11 Old 12-19-2015, 08:24 PM
ThatGuyCollin
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I run a flowmaster muffler and cat. They've been on for about 2k miles. I also put headers on like bruinjeeper, they are the pacesetter ones. It has a nice low tone and doesn't sound like a weedeater at higher rpms. Now I just need some turbo whistle lol.

94 YJ 2.5 w/ 33x12.5's, 4.88s
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post #6 of 11 Old 12-20-2015, 02:13 PM
Drednot
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I don't waste money on the unproven claims that sell the named "performance" mufflers

I go with Walker SoundFX direct fit OEM style replacement from Rock Auto. $24

http://www.rockauto.com/catalog/rafr...p?make=JEEP&ck[ID]=0&ck[idlist]=0&ck[viewcurrency]=USD&ck[PHP_SESSION_ID]=4bs37itj758n2rpif5lkq6sli2

91 YJ Sahara, 4.0L, AX-15/NP231, D30/D35@3.07
12 Cherokee 4x4,3.7L,42RLE/MP1522, D30M/8.25@3.73
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post #7 of 11 Old 12-20-2015, 05:18 PM
ThatGuyCollin
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FYI I didn't buy it for performance, the 2.5 will never have performance. My entire exhaust was poorly welded together and had a cracked muffler and gutted cat when I bought it so I replaced everything with flowmaster because it wasn't too pricey for a complete exhaust and it sounds sweet.

94 YJ 2.5 w/ 33x12.5's, 4.88s
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post #8 of 11 Old 12-20-2015, 09:41 PM
baritone_mike
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Quote:
Originally Posted by Drednot View Post
I don't waste money on the unproven claims that sell the named "performance" mufflers

I go with Walker SoundFX direct fit OEM style replacement from Rock Auto. $24

http://www.rockauto.com/catalog/rafr...p?make=JEEP&ck[ID]=0&ck[idlist]=0&ck[viewcurrency]=USD&ck[PHP_SESSION_ID]=4bs37itj758n2rpif5lkq6sli2
I didn't buy it for performance either. My cat was gutted and the cat back was rusted out. The Magnaflow cat was the cheapest I could find, and the dynomax cat back was the cheapest I could find that was not crush tube. The OE replacement crush tube was more expensive than the dynomax.

˙ɹǝʌo ɹǝʇndɯoɔ ɹnoʎ dılɟ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı
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post #9 of 11 Old 12-21-2015, 09:04 AM
bruinjeeper
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Quote:
Originally Posted by baritone_mike View Post
I didn't buy it for performance either. My cat was gutted and the cat back was rusted out. The Magnaflow cat was the cheapest I could find, and the dynomax cat back was the cheapest I could find that was not crush tube. The OE replacement crush tube was more expensive than the dynomax.
Same.

But I do like the growl

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.

~YJOTM MAY '16~
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post #10 of 11 Old 12-21-2015, 12:07 PM
csmit328
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While you're replacing exhaust pieces you could go ahead and replace the down pipe with a TJ style pipe. It runs the pipe in the gap between the oil pan and bell housing so it doesn't get smashed or ripped off.
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post #11 of 11 Old 12-21-2015, 01:43 PM
ThatGuyCollin
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Quote:
Originally Posted by csmit328 View Post
While you're replacing exhaust pieces you could go ahead and replace the down pipe with a TJ style pipe. It runs the pipe in the gap between the oil pan and bell housing so it doesn't get smashed or ripped off.
My pacesetter headers came with a down pipe that followed the above path. My stock exhaust manifold was cracked, I didn't want another cast one or the Banks header...

94 YJ 2.5 w/ 33x12.5's, 4.88s
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