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Unread 11-27-2014, 03:33 PM   #1
STAllen
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1999 WJ 
 
Join Date: Feb 2014
Location: Columbia, MO
Posts: 46
4.7 Muffler Question

So, I know there are threads about this, and I have looked and looked, and I just want to be sure because there is some inconsistent information.

I have a 99 WJ 4.7 and I am looking into getting a super 44 from flowmaster. Certain threads said the pipe size was 2.25" and some said 2.5". What size would it be? Did it change between years? I know it's annoying to have repeating threads, but I just want to be sure before I drop almost $100 on something. Thanks.

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1999 Grand Cherokee WJ/Limited/4.7 V8/Quadra-Trac II/All Stock
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Unread 11-27-2014, 04:41 PM   #2
Treleaven
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1999 WJ 
 
Join Date: Apr 2012
Location: Kelowna, BC
Posts: 239
I just put a Borla ProXS on my 99 4.7. From the cat, the pipe was 2.25" and the tail pipe was 2.5". I bought a 2.5" in/out so I needed to get a reducer for the cat side.
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1999 Jeep Grand Cherokee Limited w/ 4.7L, Borla ProXS muffler
16" KMC Enduros
2" OME lift
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