Muffler Question? -
LinkBack Thread Tools
post #1 of 2 Old 12-02-2006, 01:54 PM Thread Starter
Registered User
1993 ZJ 
Join Date: Oct 2006
Location: San Diego, CA
Posts: 180
Muffler Question?

I have a 93 4.0L ZJ and when I replaced the cat a freind of mine said that it wouldn't hurt to replace the muffler because it looks like the factory original, it does have a factory stamp on it. I have about 165,000 on it and figured it had to have been replaced at least once but it does feel real heavy. My real questions are:

1) Does the muffler have anything to do with the actual emissions or is it used to primarily to quit down the engine noise?

2) How often does a muffler need to be replaced?

3) My engine is completly stock so does adding any kind of "performance" muffler do anything for actuall performance?

Thanks for any help and advice.

chadgtr is offline  
Sponsored Links
post #2 of 2 Old 12-02-2006, 04:06 PM
Registered User
2012 KK Liberty 
Join Date: Sep 2006
Location: Vermont
Posts: 760
Originally Posted by chadgtr

3) My engine is completly stock so does adding any kind of "performance" muffler do anything for actuall performance?

Thanks for any help and advice.
Not really, not unless you do an intake. You want to help the engine breathe and exhaust more efficiently for any performance gains.

2012 KK Sport, Mopar skids, DuraTracs, Mopar Grille Guard

98 ZJ Laredo SE 4.0, 2" Skyjacker BB, JKS Quicker Discos, Goodyear Wrangler MT/Rs, K&N FIPK, Kolak cat & back exhaust, Westin Safari bar, KC lights
98ZJ SFD is offline  

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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
ZJ Muffler Question li'l jeep ZJ Grand Cherokee Forum 4 07-14-2010 08:55 PM
Muffler Question WJ-matt ZJ Grand Cherokee Forum 4 08-13-2009 06:24 AM
Muffler question.. ldav7 ZJ Grand Cherokee Forum 13 08-07-2008 09:44 PM
wj question about muffler offset acidspit86 ZJ Grand Cherokee Forum 4 03-06-2008 07:51 PM
zj muffler question XJ99RedNY ZJ Grand Cherokee Forum 6 10-16-2006 03:45 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome