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Old 06-24-2014, 03:23 PM   #1
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Modifying Exhaust

I am thinking of removing the rear muffler, replacing the resonator/muffler (middle), with a round muffler/glasspack, and ending the exhaust just after the rear axle. It should be cheaper that a muffler skid plate and the middle resonator/muffler hangs down just past the frame which makes me think it will hang up on something. Any advice?
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Old 06-24-2014, 04:28 PM   #2
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You're going to end the exhaust under the body?

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Old 06-24-2014, 05:00 PM   #3
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That picture looks different than what you described. Do you want it after the axle or before? I had my 95 YJ set up like the picture. Resonated something fierce! But was a cheap easy solution to my absence of a tailpipe. I personally wouldn't do it again. But can be done. A lot will comment on the exhaust being a hazard. But my old jeep wasn't sealed worth crap and I never smelt exhaust once. I would imagine a new jeep has sealant on the seams and such. I didn't even have the drain plugs in either.
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Old 06-24-2014, 05:21 PM   #4
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The picture is similar to what I am thinking of doing. I do want it far enough past the rear axle to get exhuast out of the Jeep (unlimited). I figure an exhuast shop can swap the middle muffler, remove the rear muffler, and extend the exhaust if needed using the factory piping. I want it tucked up as much as possible.
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Old 06-24-2014, 05:25 PM   #5
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Dynomax has it already done for you for around $190...

http://www.summitracing.com/parts/wl...Fc1lfgodoSIAGA

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Old 06-24-2014, 05:38 PM   #6
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The Dynomax exhaust ends before the rear axle and I want it to end afterwards. I am thinking modifying should be in the $100 range.
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Old 06-24-2014, 06:09 PM   #7
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I was typing mine while you were posting yours..

You should be able to replace the muffler in the resonator location and get a rear outlet for around that if using a relatively inexpensive muffler.
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Old 06-24-2014, 08:09 PM   #8
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There's a dynomax rebate going on. I just put #39522 Evolution Competition on my jeep for right around what you figured you should be able to do it for.... Just sayin

Check out #39523 and #39524 I believe they end after the axle.
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Old 06-24-2014, 11:38 PM   #9
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Your picture is the rock crawler by Dynomax and it is dumping before the axle as you can tell by the evap canister location. Ex has the correct numbers. If you want the Dynomax 39522 like Ex and I you will want to take the exhaust off up to the down pipes and drive like that for a week. Once you a good and pissed off with the sound and drone, then put on the 39522 and go on a one week, 1200 mile journey. By the time you get back you will like the sound of the Dynomax. I swear it sounds better than it did when I left the day after installing it.
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Old 06-25-2014, 07:57 AM   #10
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I went with a flowmaster between the drive shaft and frame rail.

Had to extend the pipe for WV inspection. Still love it.
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Old 06-25-2014, 08:07 AM   #11
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I apologize for the off topic here...

tsamptrail, based on the angles on your rear shocks and springs, it's possible that you need an adjustable rear trackbar. Also, your sway bar is pretty low there at full droop. Did you put on longer rear sway bar links? Full droop can be misleading, but usually there isn't 6" of compressing at normal ride height.

It looks like a fine tuning opportunity to me. Good luck!
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Old 06-25-2014, 08:40 AM   #12
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Quote:
Originally Posted by Pressurized View Post
I apologize for the off topic here... tsamptrail, based on the angles on your rear shocks and springs, it's possible that you need an adjustable rear trackbar. Also, your sway bar is pretty low there at full droop. Did you put on longer rear sway bar links? Full droop can be misleading, but usually there isn't 6" of compressing at normal ride height. It looks like a fine tuning opportunity to me. Good luck!
Thanks. Any info is appreciated. PM with recommendations.
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Old 06-25-2014, 11:28 AM   #13
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Quote:
Originally Posted by tsamptrail View Post
I went with a flowmaster between the drive shaft and frame rail.

Had to extend the pipe for WV inspection. Still love it.
That is what I was thinking of. I like how the Flowmaster has no edge to catch on rocks. How loud is it compared to the stock?

The DynoMax # 39522 is tempting but it does have an edge on the muffler and looks like it sits at or just below the frame rail.
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Old 06-25-2014, 12:20 PM   #14
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Quote:
Originally Posted by JKUR37 View Post
That is what I was thinking of. I like how the Flowmaster has no edge to catch on rocks. How loud is it compared to the stock? The DynoMax # 39522 is tempting but it does have an edge on the muffler and looks like it sits at or just below the frame rail.
It has a little louder tone than stock and a rumble to it. Not too loud at all.
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Old 06-25-2014, 04:24 PM   #15
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Quote:
Originally Posted by tsamptrail View Post
It has a little louder tone than stock and a rumble to it. Not too loud at all.
Think I will go the same route.
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Old 06-28-2014, 03:20 PM   #16
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This is what I had done. Went with 2 mufflers to get more length since they are straight through mufflers(1 would be too loud). I like that the mufflers do not have an edge to catch, small diameter, and they have a thick outer shell.
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Old 06-28-2014, 04:33 PM   #17
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Quote:
Originally Posted by tsamptrail View Post
I went with a flowmaster between the drive shaft and frame rail.

Had to extend the pipe for WV inspection. Still love it.
I have the same setup.

Flowmaster right after the resonator. Mine dumps at the axle.

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Old 06-29-2014, 08:54 AM   #18
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Originally Posted by Ex Umbris Currus View Post
There's a dynomax rebate going on. I just put #39522 Evolution Competition on my jeep for right around what you figured you should be able to do it for.... Just sayin

Check out #39523 and #39524 I believe they end after the axle.
Any sound clips of this set up on your JK?

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