muffler specs????? -
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > muffler specs?????

WIN a Rough Country Forged Track Bar - ExtremeTerrain!1987-2016 Wrangler Jammock Black 2.0 Jeep Hammock (YJ, TJ Rancho rockGEAR promotion gear from January 1-February 29,

Unread 02-17-2014, 06:22 PM   #1
Registered User
1990 YJ Wrangler 
Join Date: Oct 2009
Location: Winchester,VA, Virginia
Posts: 77
muffler specs?????

I have a 90 YJ daily driver with a 4.2. I'm replacing the tailpipe and noticed the muffler is not far from disintegrating due to rust. When it comes to getting a replacement at various parts stores they all list the "direct fit/replacement" with different sizes. Anywhere from a 2'' to a 2.25'' inlet that is either centered or offset. And a 2" to a 2.50" outlet that is either centered or offset. 13" to 19" in length. They all seem to vary per store. The muffler on it now is a dynamax and no one can seem to match it. Does anyone know the factory specs/sizing that I can use as a starting point to find a replacement?

Thanks in advance for you help.

TonkaYJ is offline   Reply With Quote Quick reply to this message
Unread 02-17-2014, 07:18 PM   #2
Registered User
1993 YJ Wrangler 
Join Date: Aug 2008
Location: Raleigh, NC
Posts: 10,444
I just put my Flowmaster back in my jeep. It has a centered inlet and an offset exit if that helps. If you pick a muffler that is similar an exhaust shop can make it work.

Have you measured what is left of your old one?

I have a jeep...and it is modified...I win.

YJOTM July 2012
YJOTM February 2014

Louie4's YJ Build
Poison Spyder Fender Install
Warn M8000 Rebuild Adventure
University of Georgia
Louie4 is offline   Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. is not in any way associated with Jeep or the Chrysler Corp.