My recommended catalytic converters
Member
Joined: May 2011
Posts: 179
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From: Saint Clair Shores, Michigan
Year: 2000
Model: Cherokee
Engine: 4.0
okay i might order it after this weekend....just have to drive it how it is for now...going camping on sunday i will get back to you i appreciate your help
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Former Sponsor
Joined: Feb 2010
Posts: 474
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From: Roanoke VA
Year: 1995
Model: Grand Cherokee
Engine: 4.0L
I'll post some universal CARB converters.
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Former Sponsor
Joined: Feb 2010
Posts: 474
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From: Roanoke VA
Year: 1995
Model: Grand Cherokee
Engine: 4.0L
Here is a link to the CARB legal converters:
http://performance-curve.com/carbleg...aapproved.aspx
Use code MAGNAFLOW for 20% off.
http://performance-curve.com/carbleg...aapproved.aspx
Use code MAGNAFLOW for 20% off.
CF Veteran
Joined: May 2008
Posts: 5,188
Likes: 6
From: Bristol,Pa
Year: 94
Model: Cherokee
Engine: 4.0L
What would you suggest for my rig?
98 ZJ 4.0L, Borla exhaust manifold so i would need a cat with the square mating flange from downpipe and still have correct length for "direct replacement" Borla catback combo.
Feel free to PM..
98 ZJ 4.0L, Borla exhaust manifold so i would need a cat with the square mating flange from downpipe and still have correct length for "direct replacement" Borla catback combo.
Feel free to PM..
Old School CF Moderator
Joined: May 2010
Posts: 9,652
Likes: 3
From: Chattanooga
Year: 2001
Model: Cherokee
Engine: 4.0
I have some clunking going on in either my muffler or my cat..starting to suspect my cat..what would you recommend for a cheap replacement for it? 98 XJ
CF Veteran
Joined: Jan 2011
Posts: 1,635
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From: Virginia
Year: 1999
Model: Cherokee
Engine: 4.0
Hey, I just placed my order for the Magnaflow exhaust with tailpipe. Which HIGH FLOW cat would I need to oreder from you that would work best with the exhaust I ordered? I have a 99 XJ 4.0. Thanks. Just figured since im redoing the exhaust might as well put in a better cat to while im at it.
CF Veteran
Joined: Jan 2011
Posts: 1,635
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From: Virginia
Year: 1999
Model: Cherokee
Engine: 4.0
The flowmaster 40 and tailpipe you order from him is 2.5". Your factory exhaust is 2.25". So you can either do another 2.25" Cat and get a coupling that goes from 2.25" to 2.5" so you can install your new flowmaster exhaust. Or get a coupling that goes from 2.25" to 2.5" and install a 2.5" Cat and then install the new flowmaster exhaust. He also sells the couplings. I think they are labeled as 2.5"-2.25" reducers. On his website.
CF Veteran
Joined: May 2012
Posts: 3,004
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From: Wilmington,NC
Year: 1989
Model: Cherokee
Engine: 4.0
I was going to edit the other converter post but I did not see the option to so I started a new thread. I receive a lot of PM's about which converter to use. I will do my best to sort it out in this thread. If your still confused on which to use just PM or call me (540-343-1593) and we can sort it out 
Remember to use the 5% discount code "CHEROKEEFORUM"
1987 - 1995 Jeep Cherokee (2.5L & 4.0L) / 1993 - 1995 Jeep Grand Cherokee (4.0L & 5.2) - OBDI converters
Spun Converters:
Thunderbolt: 410225 - 11" overall length / 4" diameter / Ceramic Core 400 holes psi
Thunderbolt 415225 - This is a true High Flow converter. 11" overall length / 4" diameter / Metallic Core 300 holes psi. Keep in mind this will increase how loud your exhaust is.
Standard Converter:
AP Exhaust: 602545 - 16" overall length / 12" Body Length / Ceramic core 400 holes psi
Remember to use the 5% discount code "CHEROKEEFORUM"
1987 - 1995 Jeep Cherokee (2.5L & 4.0L) / 1993 - 1995 Jeep Grand Cherokee (4.0L & 5.2) - OBDI converters
Spun Converters:
Thunderbolt: 410225 - 11" overall length / 4" diameter / Ceramic Core 400 holes psi
Thunderbolt 415225 - This is a true High Flow converter. 11" overall length / 4" diameter / Metallic Core 300 holes psi. Keep in mind this will increase how loud your exhaust is.
Standard Converter:
AP Exhaust: 602545 - 16" overall length / 12" Body Length / Ceramic core 400 holes psi