TJ Exhaust System - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-15-2012, 01:42 PM   #1
Jeeper
 
tcate23-WRANGLER's Avatar
 
Join Date: Oct 2011
Location: Florida
Posts: 613
TJ Exhaust System

Hey guys, I have read and researched all the exhaust threads out there and still need some help. I don't understand exactly the layout of the exhaust and the difference between cat backs and etc. I want to upgrade my exhaust on my 1997 I6, I want it louder than it is currently. I definitely don't want one of those loud,annoying exhausts. I just want it deeper and noticeable to make the engine sound better. Thanks

__________________
Build thread or it didn't happen

This Guy's Build:http://www.jeepforum.com/forum/f22/my-dub-p-tj-1356900/
tcate23-WRANGLER is offline   Quote Quick Reply
Old 11-15-2012, 01:47 PM   #2
Jeeper
 
Dextreme's Avatar
 
Join Date: Oct 2011
Location: Oregon City, OR
Posts: 3,530
Images: 1
Cat backs are usually bolt on exhaust systems that replace everything from the cat on back. The other option is to cut the muffler out with a sawall and weld in new muffler.

I went with a Thrush Welded for about $30 and also needed a small section of 2 1/4" exhaust pipe....then 3 welds. If you pick up a Thrush Welded (#17651) and took it in to a local exhaust shop to have it installed, I bet the total project would be about $60-$80.

__________________
'99 Chilli Pepper TJ Wrangler "Mistress"
33x12.5 DuraTracs
Zone 4.25"
Dextreme is offline   Quote Quick Reply
Old 11-15-2012, 01:51 PM   #3
Jeeper
 
homebrwd's Avatar
 
Join Date: Mar 2011
Location: Ashburn, VA
Posts: 1,085
If you crawl under your jeep and look up into the skid plate you will see two larger items on the exhaust the one closer to the front is the third cat and the on closer to the back is the muffler. In between them in a flange mount. Cat backs will remove everything after the flange mount and replace it.

Headers will replace the exhaust manifolds that connect to the engine.

I have the MBRP cat back and love the sound it makes, deeper growl but not extremely loud and only a small amount of drone at idle.
homebrwd is offline   Quote Quick Reply
Old 11-15-2012, 02:56 PM   #4
Jeeper
 
tcate23-WRANGLER's Avatar
 
Join Date: Oct 2011
Location: Florida
Posts: 613
Quote:
Originally Posted by Dextreme View Post
Cat backs are usually bolt on exhaust systems that replace everything from the cat on back. The other option is to cut the muffler out with a sawall and weld in new muffler.

I went with a Thrush Welded for about $30 and also needed a small section of 2 1/4" exhaust pipe....then 3 welds. If you pick up a Thrush Welded (#17651) and took it in to a local exhaust shop to have it installed, I bet the total project would be about $60-$80.
Quote:
Originally Posted by homebrwd View Post
If you crawl under your jeep and look up into the skid plate you will see two larger items on the exhaust the one closer to the front is the third cat and the on closer to the back is the muffler. In between them in a flange mount. Cat backs will remove everything after the flange mount and replace it.

Headers will replace the exhaust manifolds that connect to the engine.

I have the MBRP cat back and love the sound it makes, deeper growl but not extremely loud and only a small amount of drone at idle.
First of all, thank you for the responses! I dont think I want to replace the headers. Will that effect the sound a lot? I read that cat backs usually cost more than than they should. Also, i cannot weld so would would a thrush weld exhaust and then taken to exhaust shop be the best way to achieve the sound im looking for?

Basically I think I want a louder growl when accelerating and when at idle at little roar and when driving it to be not obnoxious.

Thanks again guys, really want to get this done!
__________________
Build thread or it didn't happen

This Guy's Build:http://www.jeepforum.com/forum/f22/my-dub-p-tj-1356900/
tcate23-WRANGLER is offline   Quote Quick Reply
Old 11-15-2012, 02:59 PM   #5
Jeeper
 
homebrwd's Avatar
 
Join Date: Mar 2011
Location: Ashburn, VA
Posts: 1,085
Yeah any good exhaust shop should be able to weld in a muffler for you. The catbacks are pricey but you'll have a better idea of what you are getting as far as sound goes (generally you'll find more youtube videos and such of cat back systems) I would say get onto youtube and start looking(listening). Make sure you use a decent set of speakers or headphones so you can listen for drone.
homebrwd is offline   Quote Quick Reply
Old 11-15-2012, 03:05 PM   #6
Jeeper
 
Dextreme's Avatar
 
Join Date: Oct 2011
Location: Oregon City, OR
Posts: 3,530
Images: 1
Quote:
Originally Posted by tcate23-WRANGLER View Post

Basically I think I want a louder growl when accelerating and when at idle at little roar and when driving it to be not obnoxious.
I think you pretty much described the Thrush Welded. It has a deep tone but won't be annoying.
__________________
'99 Chilli Pepper TJ Wrangler "Mistress"
33x12.5 DuraTracs
Zone 4.25"
Dextreme is offline   Quote Quick Reply
Old 11-15-2012, 03:22 PM   #7
Jeeper
 
tcate23-WRANGLER's Avatar
 
Join Date: Oct 2011
Location: Florida
Posts: 613
Quote:
Originally Posted by homebrwd View Post
Yeah any good exhaust shop should be able to weld in a muffler for you. The catbacks are pricey but you'll have a better idea of what you are getting as far as sound goes (generally you'll find more youtube videos and such of cat back systems) I would say get onto youtube and start looking(listening). Make sure you use a decent set of speakers or headphones so you can listen for drone.
Just did this and watched several videos. Is a glasspack a good idea? And whats the difference between the exhaust facing out compared to down?
__________________
Build thread or it didn't happen

This Guy's Build:http://www.jeepforum.com/forum/f22/my-dub-p-tj-1356900/
tcate23-WRANGLER is offline   Quote Quick Reply
Old 11-15-2012, 03:28 PM   #8
Jeeper
 
Join Date: Nov 2012
Location: Central PA
Posts: 783
Quote:
Originally Posted by tcate23-WRANGLER View Post
Just did this and watched several videos. Is a glasspack a good idea? And whats the difference between the exhaust facing out compared to down?

Down is called a "turn down" and makes the sound resonate off of the pavement, as to where out directs the sound away from you.. Out is the way to go IMO; much less drone..
__________________
-Rob

1998 Jeep Wrangler
4.0 : 5 Speed : Green with Black hard top : 33X12.50 Parnelli Jones Dirt Grip's on Eagle Alloy 15x7's : e-AutoGrille's Rock Crawler front bumper with an Engo E9000 with synthetic line
ob269 is offline   Quote Quick Reply
Old 11-15-2012, 03:28 PM   #9
Jeeper
 
00TJSport's Avatar
 
Join Date: Oct 2012
Location: Oneonta NY
Posts: 679
Images: 5
For what it's worth, I had a GMC Canyon with the 5 cylinder, put a MBRP cat-back system on it and it sounded great. When I'm done doing more important things to my TJ, that's what I'm going to buy for mine.
__________________
2000 TJ, newly remand 4.0, 3.25" Rough Country lift, Metalcloak control arms, Tom Woods DS, Advance Adapters SYE, Crown HD steering, 33x12.50x15 Wild Country MTX's, 4.10 gears
Air Force/Desert Storm Vet
00TJSport is offline   Quote Quick Reply
Old 11-15-2012, 03:29 PM   #10
Jeeper
 
Dextreme's Avatar
 
Join Date: Oct 2011
Location: Oregon City, OR
Posts: 3,530
Images: 1
I have had glass packs before and they sound very Honda ricey and they tend to get louder and louder as the glass burns out. Also they don't really deepen the sound very much.
__________________
'99 Chilli Pepper TJ Wrangler "Mistress"
33x12.5 DuraTracs
Zone 4.25"
Dextreme is offline   Quote Quick Reply
Old 11-15-2012, 03:29 PM   #11
Jeeper
 
00TJSport's Avatar
 
Join Date: Oct 2012
Location: Oneonta NY
Posts: 679
Images: 5
Quote:
Originally Posted by ob269 View Post
Down is called a "turn down" and makes the sound resonate off of the pavement, as to where out directs the sound away from you.. Out is the way to go IMO; much less drone..
x2.......you'll regret a turndown system. Drone will drive you nuts.
__________________
2000 TJ, newly remand 4.0, 3.25" Rough Country lift, Metalcloak control arms, Tom Woods DS, Advance Adapters SYE, Crown HD steering, 33x12.50x15 Wild Country MTX's, 4.10 gears
Air Force/Desert Storm Vet
00TJSport is offline   Quote Quick Reply
Old 11-15-2012, 03:32 PM   #12
Jeeper
 
TJspeed's Avatar
 
Join Date: Feb 2011
Location: New Mexico
Posts: 3,432
X2 on the thrush welded. I have one and love it. Best $39 I've ever spent!
__________________
2000 solar yellow 4.0 sport 3" BDS, 1.25" JKS body lift, 1" Zone motor lift, JKS quicker disconnects, 33x10.5 BFG KM2 on black american racing wheels. D44 rear.

TJspeed is online now   Quote Quick Reply
Old 11-15-2012, 03:38 PM   #13
Jeeper
 
Join Date: Nov 2012
Location: Central PA
Posts: 783
ps Glasspacks aren't bad from my experience. I had one on my 6 cyl ranger and I liked it, until I got my flowmaster 40 series lol..

*EDIT*

My Glasspack was like 28" long though, and I have heard that the longer the better as far as not sounding "ricey"
__________________
-Rob

1998 Jeep Wrangler
4.0 : 5 Speed : Green with Black hard top : 33X12.50 Parnelli Jones Dirt Grip's on Eagle Alloy 15x7's : e-AutoGrille's Rock Crawler front bumper with an Engo E9000 with synthetic line
ob269 is offline   Quote Quick Reply
Old 11-15-2012, 04:57 PM   #14
Jeeper
 
tcate23-WRANGLER's Avatar
 
Join Date: Oct 2011
Location: Florida
Posts: 613
Appreciate all the help everyone. What exactly is thrush welded? Like I said before I just want it a little deeper on startup and acceleration but not too annoying. Also from what I understand having it faced out would be the best? Thanks
__________________
Build thread or it didn't happen

This Guy's Build:http://www.jeepforum.com/forum/f22/my-dub-p-tj-1356900/
tcate23-WRANGLER is offline   Quote Quick Reply
Old 11-15-2012, 05:01 PM   #15
Jeeper
 
Dextreme's Avatar
 
Join Date: Oct 2011
Location: Oregon City, OR
Posts: 3,530
Images: 1
__________________
'99 Chilli Pepper TJ Wrangler "Mistress"
33x12.5 DuraTracs
Zone 4.25"
Dextreme is offline   Quote Quick Reply
Old 11-15-2012, 05:53 PM   #16
Jeeper
 
tcate23-WRANGLER's Avatar
 
Join Date: Oct 2011
Location: Florida
Posts: 613
That seems cheap to make a difference but I'm probably wrong. Seems like most if you guys are agreeing that the thrush welded is good and loud but not annoying. Not to pricey and I would just have to get it welded correct? As for the end tip, do I use my stock one? Thanks again
__________________
Build thread or it didn't happen

This Guy's Build:http://www.jeepforum.com/forum/f22/my-dub-p-tj-1356900/
tcate23-WRANGLER is offline   Quote Quick Reply
Old 11-15-2012, 06:53 PM   #17
Jeeper
 
tcate23-WRANGLER's Avatar
 
Join Date: Oct 2011
Location: Florida
Posts: 613
What about a stainless pipe from the header back with a thrush welded and maybe eliminate the 3rd cat?
__________________
Build thread or it didn't happen

This Guy's Build:http://www.jeepforum.com/forum/f22/my-dub-p-tj-1356900/
tcate23-WRANGLER is offline   Quote Quick Reply
Old 11-15-2012, 07:01 PM   #18
Jeeper
 
TJspeed's Avatar
 
Join Date: Feb 2011
Location: New Mexico
Posts: 3,432
Quote:
Originally Posted by tcate23-WRANGLER
What about a stainless pipe from the header back with a thrush welded and maybe eliminate the 3rd cat?
Love living where I do! I only have 1 cat.
__________________
2000 solar yellow 4.0 sport 3" BDS, 1.25" JKS body lift, 1" Zone motor lift, JKS quicker disconnects, 33x10.5 BFG KM2 on black american racing wheels. D44 rear.

TJspeed is online now   Quote Quick Reply
Old 11-15-2012, 07:11 PM   #19
Jeeper
 
tcate23-WRANGLER's Avatar
 
Join Date: Oct 2011
Location: Florida
Posts: 613
Quote:
Originally Posted by TJspeed View Post
Love living where I do! I only have 1 cat.
Is that what you did with your thrush? What does eliminating the cat or one of them do?
__________________
Build thread or it didn't happen

This Guy's Build:http://www.jeepforum.com/forum/f22/my-dub-p-tj-1356900/
tcate23-WRANGLER is offline   Quote Quick Reply
Old 11-15-2012, 10:58 PM   #20
Jeeper
 
Patrick H's Avatar
 
Join Date: Nov 2011
Location: Northern NM
Posts: 3,135
Quote:
Originally Posted by TJspeed View Post
Love living where I do! I only have 1 cat.
What does living where you do have to do with how many catalytic converters you have? And what happened to your pre-cats?
Patrick H is offline   Quote Quick Reply
Old 11-15-2012, 11:03 PM   #21
The Rogue Moderator

::WF Moderator::
 
Cons_Table's Avatar
 
Join Date: Aug 2009
Location: Ridgecrest, CA
Posts: 7,555
Quote:
Originally Posted by TJspeed

Love living where I do! I only have 1 cat.
I think this has to do with year of jeep, not location. I think newer TJs had the 3 cats or whatever it was while older ones only have one.
__________________
Poor Boy Racing The definition of the EVERYMAN Challenge!

Everyman Challenge XJ Build
Cons_Table is online now   Quote Quick Reply
Old 11-15-2012, 11:09 PM   #22
Jeeper
 
Patrick H's Avatar
 
Join Date: Nov 2011
Location: Northern NM
Posts: 3,135
Quote:
Originally Posted by Cons_Table View Post
I think this has to do with year of jeep, not location. I think newer TJs had the 3 cats or whatever it was while older ones only have one.
Correct, and his 2000 came with 3 cats. I was wondering how they got away with removing the front cats. (He's my nephew)
Patrick H is offline   Quote Quick Reply
Old 11-15-2012, 11:15 PM   #23
Jeeper
 
TJspeed's Avatar
 
Join Date: Feb 2011
Location: New Mexico
Posts: 3,432
Quote:
Originally Posted by Patrick H

Correct, and his 2000 came with 3 cats. I was wondering how they got away with removing the front cats. (He's my nephew)
My Jeep only has 1 cat. My ZR2 only had 1 cat as well.
__________________
2000 solar yellow 4.0 sport 3" BDS, 1.25" JKS body lift, 1" Zone motor lift, JKS quicker disconnects, 33x10.5 BFG KM2 on black american racing wheels. D44 rear.

TJspeed is online now   Quote Quick Reply
Old 11-15-2012, 11:17 PM   #24
Jeeper
 
Patrick H's Avatar
 
Join Date: Nov 2011
Location: Northern NM
Posts: 3,135
Quote:
Originally Posted by TJspeed View Post
My Jeep only has 1 cat. My ZR2 only had 1 cat as well.
Your Jeep has 3, unless someone removed the front two, which is no real easy task. What year was your Blazer? Starting in 01 they had 2 .
Patrick H is offline   Quote Quick Reply
Old 11-15-2012, 11:19 PM   #25
Jeeper
 
TJspeed's Avatar
 
Join Date: Feb 2011
Location: New Mexico
Posts: 3,432
Quote:
Originally Posted by Patrick H

Your Jeep has 3, unless someone removed the front two, which is no real easy task. What year was your Blazer? Starting in 01 they had 3 as well.
My blazer was a 2000 as well.
__________________
2000 solar yellow 4.0 sport 3" BDS, 1.25" JKS body lift, 1" Zone motor lift, JKS quicker disconnects, 33x10.5 BFG KM2 on black american racing wheels. D44 rear.

TJspeed is online now   Quote Quick Reply
Old 11-15-2012, 11:21 PM   #26
Jeeper
 
Patrick H's Avatar
 
Join Date: Nov 2011
Location: Northern NM
Posts: 3,135
Quote:
Originally Posted by TJspeed View Post
My Jeep only has 1 cat. My ZR2 only had 1 cat as well.
Go look under the intake manifold at the pipes coming off the exhaust manifold.

Patrick H is offline   Quote Quick Reply
Old 11-15-2012, 11:21 PM   #27
Jeeper
 
Patrick H's Avatar
 
Join Date: Nov 2011
Location: Northern NM
Posts: 3,135
Quote:
Originally Posted by TJspeed View Post
My blazer was a 2000 as well.
2000 Blazer only had one. Your Jeep has 3
Patrick H is offline   Quote Quick Reply
Old 11-15-2012, 11:28 PM   #28
Jeeper
 
TJspeed's Avatar
 
Join Date: Feb 2011
Location: New Mexico
Posts: 3,432
Quote:
Originally Posted by Patrick H

2000 Blazer only had one. Your Jeep has 3
Ok. Originally. I didn't know the first 2 where that high up. But I only have 1 still. Looks factory.

Attachment 178804



Attachment 178805
__________________
2000 solar yellow 4.0 sport 3" BDS, 1.25" JKS body lift, 1" Zone motor lift, JKS quicker disconnects, 33x10.5 BFG KM2 on black american racing wheels. D44 rear.

TJspeed is online now   Quote Quick Reply
Old 11-15-2012, 11:32 PM   #29
Jeeper
 
Patrick H's Avatar
 
Join Date: Nov 2011
Location: Northern NM
Posts: 3,135
I thought 2000 was the first year for 3 cats. Does look factory.

Has the older style manifold as well. What's the production date of your Jeep?
Patrick H is offline   Quote Quick Reply
Old 11-15-2012, 11:35 PM   #30
Jeeper
 
TJspeed's Avatar
 
Join Date: Feb 2011
Location: New Mexico
Posts: 3,432
Quote:
Originally Posted by Patrick H
I thought 2000 was the first year for 3 cats. Does look factory.
Mine was early 2000. I don't know if that would make a difference. But yeah only cat is the main one right before the muffler.

Production is 1-00

I thought 2000 was the start of the newer manifold?

__________________
2000 solar yellow 4.0 sport 3" BDS, 1.25" JKS body lift, 1" Zone motor lift, JKS quicker disconnects, 33x10.5 BFG KM2 on black american racing wheels. D44 rear.

TJspeed is online now   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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

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 Off
Refbacks are Off




» Featured Product

All times are GMT -5. The time now is 10:06 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC