apn header
CF Veteran
Joined: Nov 2011
Posts: 3,603
Likes: 3
From: SLC, Utah
Year: 1999
Model: Cherokee
Engine: 4.0L
CF Veteran

Joined: Apr 2012
Posts: 1,843
Likes: 2
From: Ross Vegas, Ga
Year: 2000
Model: Cherokee
Engine: 4.0 w/ tupy head
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CF Veteran
Joined: Apr 2008
Posts: 2,340
Likes: 8
From: Burlington, NC
Year: 1994...mostly...
Model: Cherokee (XJ)
Engine: 4.0L I6 HO, Lot's of Bolt Ons
I've also decided to order likely a APN header.
However, I've heard I might have to modify it to work with the 99 intake manifold swap I'm doing.
Is there any real benefit between it and the new OEM ones that have bellows to keep from cracking?
However, I've heard I might have to modify it to work with the 99 intake manifold swap I'm doing.
Is there any real benefit between it and the new OEM ones that have bellows to keep from cracking?
Thread Starter
Member
Joined: Apr 2012
Posts: 237
Likes: 0
From: savannah
Year: 1997
Model: Cherokee
Engine: 4.0
From what I've been reading, those bellows end up cracking contrary to advertisement. Best bet is check/replace motor mounts and trans mount then install new header. If your mounts are shot your going to continually crack the header as you replace. Everyone raves about the knockoffs of banks and a couple other brands. All look exactly the same. Iirc for the 99+ you just have to grind a little off for clearance so you don't have a vacuum leak
CF Veteran
Joined: Nov 2011
Posts: 3,603
Likes: 3
From: SLC, Utah
Year: 1999
Model: Cherokee
Engine: 4.0L
From what I've been reading, those bellows end up cracking contrary to advertisement. Best bet is check/replace motor mounts and trans mount then install new header. If your mounts are shot your going to continually crack the header as you replace. Everyone raves about the knockoffs of banks and a couple other brands. All look exactly the same. Iirc for the 99+ you just have to grind a little off for clearance so you don't have a vacuum leak
Thread Starter
Member
Joined: Apr 2012
Posts: 237
Likes: 0
From: savannah
Year: 1997
Model: Cherokee
Engine: 4.0
If you look online there is a fare amount of people with issues with header install on 99+. Just a little grinding from what it sounds like. Google and see.
CF Veteran
Joined: Apr 2008
Posts: 2,340
Likes: 8
From: Burlington, NC
Year: 1994...mostly...
Model: Cherokee (XJ)
Engine: 4.0L I6 HO, Lot's of Bolt Ons
Also x2 on comments about people cracking new manifolds due to not replacing mounts prior to installs.


