Exhaust manifold upgrade?
Based on second hand info I ordered online a manifold for a newer model that has the "bellows" in the #1 and #6 cyl pipes for my 93 4.0L ho. I would really like to hear from someone that has actually put the later model manifold on an older engine before I try to tear it apart. I am disabled and it is going to be about all I can handle so I want to get it done the first time.
Can anyone help me with this?
Thanks.
Can anyone help me with this?
Thanks.
CF Veteran
Joined: Apr 2009
Posts: 4,734
Likes: 12
Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
I put a MOPAR one on my '92 H.O.
The accordion folds supposedly give the manifold room to expand, thereby reducing the likely hood of cracking. My old one was badly cracked when I bought it.
I used OEM because I didn't want any matching up or mating issues that might be caused by sloppy aftermarket ones.
It wasn't cheap, but I'm glad I did it. No problems whatsoever.
The accordion folds supposedly give the manifold room to expand, thereby reducing the likely hood of cracking. My old one was badly cracked when I bought it.
I used OEM because I didn't want any matching up or mating issues that might be caused by sloppy aftermarket ones.
It wasn't cheap, but I'm glad I did it. No problems whatsoever.
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
If the newer manifold has two 02 sensors....Well if it's going to be inspected I might be careful that your single upstream 02 is located somewhere to catch all six. Just a thought, Idk if that's a real issue or not.
CF Veteran




Joined: May 2012
Posts: 7,965
Likes: 964
From: Lost in the wilds of Virginia
Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
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