Difference between cj/yj headers? - JeepForum.com

 
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post #1 of 6 Old 09-21-2013, 09:44 AM Thread Starter
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!!!


'93 V8 ZJ Mountain Goat Edition.
'95 V8 ZJ Limited, '97 4.0L ZJ TSi
'96 4.0L 2wd XJ, '88 4.2L YJ
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post #2 of 6 Old 09-21-2013, 11:47 AM
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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post #3 of 6 Old 09-21-2013, 11:55 AM
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.

Do everything with a positive attitude, it won't always work but you'll piss enough people off to make it worthwhile.

the voices aren't real but they sure have good ideas.
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post #4 of 6 Old 09-21-2013, 01:12 PM
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

1989 Base YJ,4.2l,DIY GM TBI,AX15,Np231 SYE/6 pin planetary/Wide chain, D30 ARB, 8.8 ARB 4.56
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post #5 of 6 Old 09-21-2013, 10:55 PM Thread Starter
Maine1994ZJ
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Thanks for the clarification guys!!

The search is on!

'93 V8 ZJ Mountain Goat Edition.
'95 V8 ZJ Limited, '97 4.0L ZJ TSi
'96 4.0L 2wd XJ, '88 4.2L YJ
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post #6 of 6 Old 09-22-2013, 06:55 AM
superj
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Also, some cj headers have deeper mounting flange bolt holes. Like over an inch deep.

I don't feel like working on anything at this time so i sold my yj.
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