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Unread 02-07-2015, 01:06 AM   #1
workinboy
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Exhaust.... What should I do?

So like many of you, I have experienced cracked headers. Anyway, since I bought the jeep and this was my first project with it, I decided to splurge and get some Clifford Performance headers that dump into two instead of one.

I installed the new headers tonight and here is my question... Should I just have a y-pipe welded on and/or run the stock exhaust or should I have dual pipes installed? I'm not really educated much on exhaust systems, but just wanted some opinions. I've read that doing dual exhausts when it's not true is not a good way to go, but since this would be true dual exhaust, I wanted to get some opinions.

Thanks guys!

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Unread 02-07-2015, 01:39 AM   #2
Knuckelhead
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If you fill-in your profile, that would help...
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Unread 02-07-2015, 01:56 AM   #3
Dave02TJ
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I would stay away from dual pipes myself, after someone fabbed up your cool looking duals chances are the performance wont be as good as what you already have. My thoughts are the scavenging of the exhaust gasses will be more efficient with a single exhaust. Just keep everything as simple as possible in my opinion.

Just my opinion of course.
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Unread 02-07-2015, 02:11 AM   #4
Knuckelhead
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Quote:
Originally Posted by Dave02TJ View Post
I would stay away from dual pipes myself, after someone fabbed up your cool looking duals chances are the performance wont be as good as what you already have. My thoughts are the scavenging of the exhaust gasses will be more efficient with a single exhaust. Just keep everything as simple as possible in my opinion.

Just my opinion of course.
Or he could install the 2 piece exhaust manifold with the aftermarket "Y" pipe from the 2000+ 4.0L TJ.




... IMO
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Unread 02-07-2015, 10:03 AM   #5
workinboy
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Quote:
Originally Posted by Knuckelhead View Post
If you fill-in your profile, that would help...
Oops. Yeah that would be. 97 Wrangler

Quote:
Originally Posted by Dave02TJ View Post
I would stay away from dual pipes myself, after someone fabbed up your cool looking duals chances are the performance wont be as good as what you already have. My thoughts are the scavenging of the exhaust gasses will be more efficient with a single exhaust. Just keep everything as simple as possible in my opinion.

Just my opinion of course.
Okay yeah. That makes sense.

Quote:
Originally Posted by Knuckelhead View Post
Quote:
Originally Posted by Dave02TJ View Post
I would stay away from dual pipes myself, after someone fabbed up your cool looking duals chances are the performance wont be as good as what you already have. My thoughts are the scavenging of the exhaust gasses will be more efficient with a single exhaust. Just keep everything as simple as possible in my opinion.

Just my opinion of course.
Or he could install the 2 piece exhaust manifold with the aftermarket "Y" pipe from the 2000+ 4.0L TJ.




... IMO
The Clifford headers did come with a y pipe to merge it into one. Just wasn't sure if I should do that or run dual pipes.
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Unread 02-07-2015, 10:31 AM   #6
RnEmOvr
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Running duals on an inline motor has no benefit. Also running one pipe sucks bad enough, couldn't imagine running a second
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Unread 02-07-2015, 10:31 AM   #7
Andy5150
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A single 2 1/4 or 2 1/2" is more than enough.
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Unread 02-09-2015, 02:07 PM   #8
workinboy
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Okay, cool. Thanks for the advice guys...

I called a local muffler shop today and they quoted me $40 to install the y-pipe that came with the headers, leaving the stock exhaust on there. They also quoted me around $175 to install a new system if I brought the cat and muffler with me.

Decisions, decisions.... Any suggestions?
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Unread 02-09-2015, 06:58 PM   #9
1998tjsahara
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If your getting a aftermarket muffler you should think about the banks power monster. Mine sounds awesome on my 4.0
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Unread 02-13-2015, 02:01 PM   #10
workinboy
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Already got the headers installed. A local muffler shop will weld the y-pipe in for $40, or redo the exhaust for around $180 (if I bring cat and muffler).

Here is what I'm looking at for the cat and muffler... what do you guys think?

cat (thunderbolt high flow): http://performance-curve.com/425225.aspx
muffler (flowmaster 50 delta flow): http://performance-curve.com/942452-...offset225.aspx

Any other recommendations/advice would be appreciated!

Should I stay with 2.25 or go to 2.5?

Thanks guys!
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Unread 02-13-2015, 02:36 PM   #11
joe_jeep
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2.25 is plenty, a bigger pipe wont help any.
Any muffler or cat will work.
The delta 50 u are looking at is kinda cool.
Not too loud. A little low growl to it.
U might consider adding a braided flex pipe to the system in front of the cat.
It will flex enough to stop most cracking. Takes stresses off the header.
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Unread 02-13-2015, 05:18 PM   #12
05x
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Also tossed on a Banks cat back sounds good
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