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Old 10-21-2012, 08:20 PM
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Originally Posted by partsguyct
Anyone use the performance curve universal 2.25"muffler? How does it compare to a magnaflow or thrush? Thinking about ordering that since its low cost.
I posted my install. I also posted a link that a 3rd party compares most muffler in sound and performance. I hope it helps you.

https://www.cherokeeforum.com/f58/dy...talled-152232/
Old 10-21-2012, 08:22 PM
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Originally Posted by Precept
Serious exhaust question;
The exhaust manifold bolts to the exhaust pipe that then bolts to the cataylic converter. I have a rather large dent in the pipe just aft of the exhaust manifold where the two bolts and gasket are (on the cataylic side). Is this something I should be concerned about?
Its factory, so your axle doesn't hit it. If your stock height, leave it. You can replace it like I did (my XJ is lifted) with a Walker down pipe.

https://www.cherokeeforum.com/f58/dy...talled-152232/

Last edited by CrawlerXJ; 10-21-2012 at 08:26 PM.
Old 10-21-2012, 08:59 PM
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Originally Posted by CrawlerYJ

I posted my install. I also posted a link that a 3rd party compares most muffler in sound and performance. I hope it helps you.

https://www.cherokeeforum.com/f58/dy...talled-152232/
Thanks for the info
Old 10-21-2012, 09:01 PM
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i have a stock motor would a header and stock cat with a flowmaster be a good combo? looking for better sound and performance but dont want to lose backpressire and lose performance
Old 10-21-2012, 09:03 PM
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Thought I would let people in here know about my for sale thread. Flowmaster super 44 for $50 check it out https://www.cherokeeforum.com/f74/fe...4-50-a-152366/ let me know if this is illegal to do just thought it would fit in here
Old 10-21-2012, 09:04 PM
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Good deal^
Old 10-22-2012, 09:49 AM
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Originally Posted by johnturbo
i have a stock motor would a header and stock cat with a flowmaster be a good combo? looking for better sound and performance but dont want to lose backpressire and lose performance
Check out my post. Definite power gain. The down pipe and the dent restrict a lot of exhaust. The down pipe is cheaper than a header. The link I also posted shows Flowmaster doesnt have a lot of horse power gain. You posted more power. So, look into another muffler. Again, read the link I posted. There is a link there where 3rd party tested all the mufflers.
Old 10-22-2012, 12:48 PM
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I got my PC single chamber "muffler" the other day. Seems to be identical to the super 10 but with only one baffle
Old 10-22-2012, 12:54 PM
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I have a thrush welded 2 chamber muffler 2.5 in. 2.5 out. Sounds OK but about the same as slow masters. Wouldn't say i recommend it
Old 10-22-2012, 07:12 PM
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Originally Posted by CrawlerYJ

Check out my post. Definite power gain. The down pipe and the dent restrict a lot of exhaust. The down pipe is cheaper than a header. The link I also posted shows Flowmaster doesnt have a lot of horse power gain. You posted more power. So, look into another muffler. Again, read the link I posted. There is a link there where 3rd party tested all the mufflers.
The only problem I have with that link is that it tested them on a 5.0l mustang, so how could that relate to our xj's? It would seem like the horsepower gains and torque values would be a little different no?
Old 10-23-2012, 03:12 AM
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Originally Posted by JerrytheJeep
The only problem I have with that link is that it tested them on a 5.0l mustang, so how could that relate to our xj's? It would seem like the horsepower gains and torque values would be a little different no?
Short answer. No.

Long answer? Power gain is power gain, no? Its like asking which weight more, 2lbs of feathers, or 2lbs of sugar.

Am I to assume you think there is no gain on a 4.0 only a 5.0l? lol
Old 10-23-2012, 09:13 AM
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I was thinking of doing an exhaust a little while ago, so I looked up ones on you tube and they all seemed to have a ricer sound to them. I was wondering if it was just the videos or if it does have a ricer sound to it. I know that someone has probably asked this before but don't have the time to read through 56 pages lol
Old 10-23-2012, 09:51 AM
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Originally Posted by Acroyle17
I was thinking of doing an exhaust a little while ago, so I looked up ones on you tube and they all seemed to have a ricer sound to them. I was wondering if it was just the videos or if it does have a ricer sound to it. I know that someone has probably asked this before but don't have the time to read through 56 pages lol
A lot of them are the videos
Old 10-23-2012, 12:12 PM
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What would be the best option to get, I want it to be a little louder but not obnoxious
Old 10-23-2012, 12:37 PM
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Originally Posted by Acroyle17
What would be the best option to get, I want it to be a little louder but not obnoxious
http://performance-curve.com/jeep.aspx
Here is couple of universal exhaust kits lower part of the page of link shared for pretty cheap(universal fit may need to do some modification, I did).
I purchased the Magnaflow Exhaust has a decent mid range rumble definitely louder but not overbearing. Solid performance gained about 2.7 mpg out of it as well.


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