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Unread 09-21-2013, 10:44 AM   #1
Maine1994ZJ
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Difference between cj/yj headers?

The search function proved useless for my question... Again.
I also found nothing in the FAQs
Is there a difference between a header for a CJ w/258 & standard trans and a header for a YJ w/258 & standard trans?
I prefer to shop locally as much as possible and would rather use my normal local suppliers if at all possible.
Of the 2 suppliers I use most, neither can produce a YJ header for my application, but both can find a header for a similarly equipped CJ.
Will the CJ header work on my wife's YJ, or are they 2 different critters?

I'm sure someone here will have some insight for me.
Thanks in advance!!!

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Unread 09-21-2013, 12:47 PM   #2
Reno72
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There was a thread about this, I don't remember all of it, but there was a difference between the headers. Here is one for an "87-91". It's not cheap, but I have it on my 4.0 and it made a noticeable difference.
http://www.quadratec.com/products/17601_03_07.htm

BTW When my YJ had trouble passing smog, the test facility said my Borla header had the 02 sensor reading only 3 cylinders. I called up Borla and they said the new ones fit after the collector and read all 6. They sent a new one out at N/C.
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Unread 09-21-2013, 12:55 PM   #3
roadyrob
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a cj is passenger side front axle, they yj is drivers side so the header is made different to clear.
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Unread 09-21-2013, 02:12 PM   #4
c5wagner
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Quote:
Originally Posted by roadyrob View Post
a cj is passenger side front axle, they yj is drivers side so the header is made different to clear.
x2
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Unread 09-21-2013, 11:55 PM   #5
Maine1994ZJ
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Thanks for the clarification guys!!

The search is on!
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Unread 09-22-2013, 07:55 AM   #6
superj
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Also, some cj headers have deeper mounting flange bolt holes. Like over an inch deep.
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