Flowmaster Super 40
Imo 2.5" sounds better but you will have to run 2.5" pipes all the way back. When I had my exhause done I ran 2.5" pipes from the header all the way back and it sounds much better than my last jeep with 2.25" pipes. The video sounds kinda similar to mine. The addition of a header will change the sound a ton.
is there really a big difference? i have 2.25" now, but dont have enough money to replace everything between the muffler and the headers. can you somehow do 2.25" in and 2.5" out with the muffler? or am i better off getting the 2.25" in/out? or is that even worth it... i really do want my jeep to sound deeper and louder

i also noticed that performance curve only has the 2.5"... or atleast thats all i saw..
CF Veteran
Joined: Oct 2009
Posts: 2,867
Likes: 16
From: Fauquier County, Virginia
Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
I have performance curves 2.5" tailpipe, flowmaster super 44, and 2.5" high flow cat connected to my stock downpipe via an adapter. Just haven't had the time to deal with a new downpipe plus I hear the dent has clearance purpose?
Originally Posted by 1991Jeep_Man
I have performance curves 2.5" tailpipe, flowmaster super 44, and 2.5" high flow cat connected to my stock downpipe via an adapter. Just haven't had the time to deal with a new downpipe plus I hear the dent has clearance purpose?
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Is there a muffler that doesn't soundy "rice-y" at higher RPM on a 6cyl? On a V8 such as my Dodge, the exhaust has an aggressive roar when you step on it. Maybe it was just the video sound, but I wasn't too crazy with the sound at higher RPM. Loved the low rumble though. Not hatin', I'm just curious for my own knowledge.
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
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