all muffler and exhaust questions go here!!!!!!
Originally Posted by jeepheep1
Just watched some videos on both the 10 and 40, think I'm going with the 40
Senior Member
Joined: Aug 2009
Posts: 558
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From: Mildenhall, United Kingdom
Year: 1996
Model: Cherokee
Engine: 4.0L H.O.
Im getting a new cat soon and want a high flow, but what should I get? and I'm not going to have a muffler, but is 3'' piping too big?
CF Veteran
Joined: Nov 2011
Posts: 2,433
Likes: 6
From: Northern MN
Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
CF Veteran
Joined: Feb 2012
Posts: 1,222
Likes: 1
From: Buffalo, NY
Year: 2001
Model: Cherokee
Engine: 4.0
Originally Posted by 91XJMudMan
Im getting a new cat soon and want a high flow, but what should I get? and I'm not going to have a muffler, but is 3'' piping too big?
CF Veteran
Joined: Nov 2011
Posts: 2,433
Likes: 6
From: Northern MN
Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
CF Veteran
Joined: May 2012
Posts: 3,004
Likes: 1
From: Wilmington,NC
Year: 1989
Model: Cherokee
Engine: 4.0
Member
Joined: Mar 2012
Posts: 205
Likes: 0
From: Salem,Virginia
Year: 1992
Model: Cherokee
Engine: 4.0
Muffler delete(straightpipe),2.5 piping,2.5 spincat from performance-curve.com,3.5 silver vein angle cut tip.I get compliments all the time,it really isn't that loud and doesn't drove on the interstate.
As far as hitch/shackle issues go,i think i had it pretty bad.I had about an inch between my shackle and hitch and couldn't handle the terrible noise the tailpipe was making.
We went this route.We rerouted it to exit just under the ps quarter panel,like alot of the newer rams.It worked out great and this may be a solution/option for others.


As far as hitch/shackle issues go,i think i had it pretty bad.I had about an inch between my shackle and hitch and couldn't handle the terrible noise the tailpipe was making.
We went this route.We rerouted it to exit just under the ps quarter panel,like alot of the newer rams.It worked out great and this may be a solution/option for others.


CF Veteran
Joined: Feb 2012
Posts: 1,222
Likes: 1
From: Buffalo, NY
Year: 2001
Model: Cherokee
Engine: 4.0
Originally Posted by Slim357
I do agree I have a class 3hitch and I bearly fit the 2.5 inch pipe between the leaf spring and the hitch
Former Sponsor
Joined: Feb 2010
Posts: 474
Likes: 0
From: Roanoke VA
Year: 1995
Model: Grand Cherokee
Engine: 4.0L
Muffler delete(straightpipe),2.5 piping,2.5 spincat from performance-curve.com,3.5 silver vein angle cut tip.I get compliments all the time,it really isn't that loud and doesn't drove on the interstate.
As far as hitch/shackle issues go,i think i had it pretty bad.I had about an inch between my shackle and hitch and couldn't handle the terrible noise the tailpipe was making.
We went this route.We rerouted it to exit just under the ps quarter panel,like alot of the newer rams.It worked out great and this may be a solution/option for others.
As far as hitch/shackle issues go,i think i had it pretty bad.I had about an inch between my shackle and hitch and couldn't handle the terrible noise the tailpipe was making.
We went this route.We rerouted it to exit just under the ps quarter panel,like alot of the newer rams.It worked out great and this may be a solution/option for others.
CF Veteran


Joined: Jun 2011
Posts: 2,720
Likes: 44
From: Gainesville GA
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
I don't feel like reading thru 101 pages so forgive me if this has been covered.
I picked up a Flowmaster @ the yard.It has alot of numbers stamped on it. How do you decyfer the numbers to see which series or stock # it is?
It was on a 4.0 ZJ but that doesn't mean thats it made specifically for a 4.0.
Thanks.
I picked up a Flowmaster @ the yard.It has alot of numbers stamped on it. How do you decyfer the numbers to see which series or stock # it is?
It was on a 4.0 ZJ but that doesn't mean thats it made specifically for a 4.0.
Thanks.
CF Veteran
Joined: Nov 2011
Posts: 2,433
Likes: 6
From: Northern MN
Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
Hey guys I'm17 new at exhaust and I need some help. I know the answer is probably in here some where but I figure why not ask haha. What would someone recommend for getting a better sound that doesn't drone into the cab but sounds good on a stock DD Cherokee, I also don't want to lose any MPG. I just want something a little more aggressive but nothing extreme for sure haha. Thanks in advance guys I really appreciate it!



