all muffler and exhaust questions go here!!!!!!
08-24-2020, 07:51 PM
#5086
Seasoned Member
TO MY KNOWLEDGE, ALL 1997-2000 xj'S ARE 50 STATE CERTIFIED AND THE HEADER PIPE IS 2" to the front cat- 2-1/4" out, 2-1/4" in and 2-1/2" out of the second cat
08-26-2020, 04:17 PM
#5088
Newbie
Join Date: Jun 2020
Location: Torrance, CA
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Year: 2001
Model: Cherokee (XJ)
Flowmaster 50 delta flow?
I was thinking about getting the FM delta Flow 50 with a 2.5 mandrel bent exhaust on my 2001 Jeep XJ and was wondering if any of you have had it or know how loud it is. I've tried to get a sense of its sound by videos on YouTube but it seems like all of the videos sound different. I don't want it to be wake up my neighbors loud and I don't want droning in the car. But I do want it to be a little louder than stock. Let me know if you have any comments at all. thanks
09-02-2020, 07:31 AM
#5090
Seasoned Member
If you fail, then you need to know what readings failed so you can troubleshoot. A new CAT will mask several problems but won't fix it, and you'll have to deal with it again in two years.
I also have an 89 and have fought smog tests since 2000.
09-02-2020, 07:39 AM
#5091
Seasoned Member
09-12-2020, 07:30 PM
#5092
Hey so I'm pretty well knowing when it comes to exhaust questions. So instead of making a new thread for your question post it here and I or someother people will answer it for you...or pm me if u need a question answered right now like an emergency. Other then that I'm mostly on everyday. So post up some questions. From what to look for in a new muffler. Or to troubleshooting questions. Thanks all lets see those posts
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EuroJeep (03-14-2021)
09-29-2020, 12:27 AM
#5093
Newbie
Join Date: Aug 2020
Location: Canada
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Year: 1999
Model: Cherokee (XJ)
Engine: 4.0L
Best I've sound I've heard is on my son's 4.0 TJ. It's a Borla of some type. Folks who heard it at Jeep Beach last year were asking if he had done a small block V8 conversion to it. Possibly this one:
https://www.borla.com/products/proxs...rt__40665.html
But why do you want to go 2" when stock is 2.25"?
https://www.borla.com/products/proxs...rt__40665.html
But why do you want to go 2" when stock is 2.25"?
Oops I meant go 2.25 or 2.5. I measured the exhaust diameter incorrectly. Thank you for letting me know
09-29-2020, 12:50 AM
#5094
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Join Date: Aug 2020
Location: Canada
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Year: 1999
Model: Cherokee (XJ)
Engine: 4.0L
Exaust
I am torn on options for an exhaust upgrade. The 3 kits I'm looking at are the Magnaflow XJ jeep cherokee street series, Borla XJ cherokee cat back, and the AFE MACH Force-Xp. I want a loud deep growl, but not insane. but when its still with the engine running still a bit of noise. Ive seen videos of all except for the AFE. Any opinions on which one of the 3 is best for what im looking for? And if anyone has a video of the AFE exhaust please let me know
10-08-2020, 10:27 AM
#5095
Senior Member
Installed a Walker QuietFlow SS muffler a few weeks ago and it's already turned brown (not rusted, just brownish in color). I remember this happened with a previous Walker muffler I had years ago on another XJ -- just wondering what causes this discoloration from the Stainless color.
10-08-2020, 11:07 AM
#5096
Member
Installed a Walker QuietFlow SS muffler a few weeks ago and it's already turned brown (not rusted, just brownish in color). I remember this happened with a previous Walker muffler I had years ago on another XJ -- just wondering what causes this discoloration from the Stainless color.
10-09-2020, 02:35 PM
#5097
Newbie
Join Date: Sep 2020
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Model: Cherokee (XJ)
Cat removal
Any tips on removing the cats? I'm trying to remove my oil pan but gotta get the exhaust out the way but the bolts are real hard to get to and im not sure the right size. Any advice would help thanks! I'ts a 2001 XJ sport
10-10-2020, 09:59 AM
#5098
Seasoned Member
Exhaust V-Band Clamp
https://www.summitracing.com/parts/sum-694225
12-17-2020, 11:10 PM
#5100
Newbie
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Model: Cherokee (XJ)
I’m new to the XJ and have a’99 4.0 I’m getting a p0132 code which is O2 sensor. Questions
are the upstream and downstream sensors exactly the same?
whoo makes the best O2 sensors for the 97-01 4.0?
what r the most common (electrical) issues for the O2 sensors?
my reader cannot distinguish which O2 sensor is bad, is there a way to figure it out or do i. Replace both?
are the upstream and downstream sensors exactly the same?
whoo makes the best O2 sensors for the 97-01 4.0?
what r the most common (electrical) issues for the O2 sensors?
my reader cannot distinguish which O2 sensor is bad, is there a way to figure it out or do i. Replace both?