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XJ Ask the Question Thread
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
This is about what I was thinking. I was hoping Cruiser or 5-90 might weigh in with experience.
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
CF Veteran
Joined: Feb 2012
Posts: 6,468
Likes: 18
From: Forest Hill, Maryland
Year: 1998
Model: Cherokee
Engine: 4.0L
Ok header replacement.
What is the general best one to get?
I know theres APN, Pacesetter.
I'm looking for something with some performance gain, but also serves as a good replacement period.
Is APN the normal one that people usually get?
What is the general best one to get?
I know theres APN, Pacesetter.
I'm looking for something with some performance gain, but also serves as a good replacement period.
Is APN the normal one that people usually get?
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
You running the Baja 1000 or Indy? Get the APN. If you want performance, have a new headpipe made that eliminates the "crush" in the one you have. Have the muffler shop tuck it up higher than stock. Get a flex pipe after the downpipe to save stress on your new manifold.
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
You running the Baja 1000 or Indy? Get the APN. If you want performance, have a new headpipe made that eliminates the "crush" in the one you have. Have the muffler shop tuck it up higher than stock. Get a flex pipe after the downpipe to save stress on your new manifold.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Senior Member
Joined: May 2013
Posts: 541
Likes: 1
From: Vancouver
Year: 1998 and 1988
Model: Cherokee
Engine: 4.7
To fit it in a 98, I got a O2 bung welded the same distance as the factory location of the old pipe and plugged the other location as well as the EGR tube opening with brass fittings from the hardware store. Go stainless steel
A flex pipe is a great idea
Last edited by karl4x4; Aug 8, 2013 at 10:20 PM.
CF Veteran
Joined: Aug 2012
Posts: 1,281
Likes: 2
From: Bentonville, AR
Year: 1990
Model: Cherokee
Engine: I6 4.0





