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Old 01-05-2012, 12:02 PM
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Originally Posted by Outlaw Star
Looks like either a small resonator or small pre-cat.
Could be a pre Cat Huh?? Did the 98' California Models have a "pre-cat" on them does anybody know...?
Old 01-05-2012, 07:22 PM
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Originally Posted by lostbuckaroo
Hey guys I'm gettin ready to install my new Performance curve tail pipe and muffler this weekend. I'm also doing a new Cat. My current exhaust system is not stock.. it appears to be custom mandrel bent down/S pipe up to the current (bad) cat converter. My question is this... From my down pipe as it crosses under the center (bell housing) there is a barrel looking thing... The down pipe appears to be 2 or 2.25" going into the barrel and comes out at 2.5" on the other side of the barrel. I don't know what this barrel is??? I've read allot about putting flex joints on these XJ exhaust systems... Should I cut and replace barrel thing with a piece of flex pipe??

Here's a pic
Anyone Else?
Old 01-05-2012, 07:31 PM
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Originally Posted by lostbuckaroo
Anyone Else?
A pic would probably help.
Old 01-05-2012, 07:46 PM
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Just go back one page.. sorry.
Old 01-05-2012, 10:00 PM
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So my lovely momma dukes got me a flowmaster super 44 muffler for christmas...but it's a 2.5in/2.5 dual out... how difficult will it be for me to run the second pipe around the gas tank without too much bend to affect performance??
Old 01-05-2012, 10:47 PM
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If this looks like too tight of a fit to you then you can always cap and weld one outlet.
Old 01-05-2012, 10:53 PM
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OR you could sell that super 44 and buy one from MUDFROG (vender on here) on his website www.performance-curve.com. That way you can get one with the correct inlet/outlet you need. He sells them for only $60 plus free shipping and you can enter the cupon code CHEROKEEFORUM and get an additional 5% off your order. Just a thought.
Old 01-05-2012, 11:06 PM
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Originally Posted by Chris01XJ
OR you could sell that super 44 and buy one from MUDFROG (vender on here) on his website www.performance-curve.com. That way you can get one with the correct inlet/outlet you need. He sells them for only $60 plus free shipping and you can enter the cupon code CHEROKEEFORUM and get an additional 5% off your order. Just a thought.
Thats how I did it I got the supper 44 and and 2.5in tail pipe for $150 shipped with the coupon code. Can't wait to have it welded in!
Old 01-05-2012, 11:56 PM
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Originally Posted by lostbuckaroo
Could be a pre Cat Huh?? Did the 98' California Models have a "pre-cat" on them does anybody know...?
I think that every OBDII California XJ did, but don't quote me.
Old 01-06-2012, 01:52 AM
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Originally Posted by Jmb94

I think that every OBDII California XJ did, but don't quote me.
Every Cali vehicle is mandated cat since the clean air act in I think the early 90's. I live here and have a 98, it has a cat, and so did the old 92 I looked at a while back. If it didn't, it will have one now to pass retarded smog codesv
Old 01-06-2012, 01:58 AM
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Originally Posted by lostbuckaroo
Could be a pre Cat Huh?? Did the 98' California Models have a "pre-cat" on them does anybody know...?
I do know for a fact that it being there has nothing to do with being a California model XJ. All of my XJ's have had that bulge in the exhaust and personally I believe its just for resonation. If your replacing the pipe anyway just cut it right before it and look inside to see if it has any cat material inside of it. If its just hollow run it strait piped. All Cherokee's come with that piping from the factory.
Old 01-06-2012, 02:03 AM
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Originally Posted by austinjoe13
If this looks like too tight of a fit to you then you can always cap and weld one outlet.
96 Jeep Cherokee True Duel Exhaust Routing - YouTube
lol... no such thing as "true dual" exhaust on a 4.0 unless you run the split manifold.
Old 01-06-2012, 09:49 AM
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Originally Posted by 89Laredo
lol... no such thing as "true dual" exhaust on a 4.0 unless you run the split manifold.
You wouldn't believe how many comments this guy has about that Its possible though. Pacestter with an X pipe with an O2 bung in it. I'd just hate to be the poor guy to work it out.
Old 01-06-2012, 10:21 AM
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Originally Posted by auburn_XJ
Every Cali vehicle is mandated cat since the clean air act in I think the early 90's. I live here and have a 98, it has a cat, and so did the old 92 I looked at a while back. If it didn't, it will have one now to pass retarded smog codesv
Right - I've got a regular Cat but I was wondering what this bulge was on the S pipe... could be a pre-cat or resonator.

Originally Posted by XxXJ99xX
I do know for a fact that it being there has nothing to do with being a California model XJ. All of my XJ's have had that bulge in the exhaust and personally I believe its just for resonation. If your replacing the pipe anyway just cut it right before it and look inside to see if it has any cat material inside of it. If its just hollow run it strait piped. All Cherokee's come with that piping from the factory.
Now that's what I was wanting to know! If all your XJ's have had the bulge then I know it's normal. As for whether it's a pre-cat or resonator.. like you say I guess there's only one way to find out!! ..... Thanks!
Old 01-06-2012, 11:10 AM
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Originally Posted by lostbuckaroo
Right - I've got a regular Cat but I was wondering what this bulge was on the S pipe... could be a pre-cat or resonator.



Now that's what I was wanting to know! If all your XJ's have had the bulge then I know it's normal. As for whether it's a pre-cat or resonator.. like you say I guess there's only one way to find out!! ..... Thanks!
Anything to help out a fellow Jeeper, and I've personally never had one apart but im pretty sure it isnt a cat. Just dont quote me on that, I know in 99 they upped the emissions standards but your 98 shouldnt have anything. Let us know what you find out!


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