Exhaust mods? - JeepForum.com
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 JeepForum.com > Models > Jeep Wrangler Forums > TJ Wrangler Technical Forum > Exhaust mods?

Yeti Paracord Handles are in at JeepHut.comFS: Jeep Fog Light LED Bulbs! Several Brightness Options! 6th annual beat your wife to the credit cards sale!!

Unread 08-09-2010, 10:01 AM   #1
Registered User
2001 TJ Wrangler 
Join Date: Jan 2010
Location: Ontario,Canada
Posts: 111
Exhaust mods?

Ive got a banks Monster Exhaust cat back on my 4.0L TJ right now. Sounds really good and I like it, but I want to add some more to the exhaust. I was thinking about a header and a hi-flow cat. Woud these mods get the extra sound Im looking for and possibly performance? Are there any other exhaust mods you guys can suggest? Ive heard that headers can rob the engine of its low end power, but maybe thats just a myth.

Any help on this would be appreciated.

01-TJ is offline   Reply With Quote Quick reply to this message
Unread 08-09-2010, 10:05 AM   #2
Registered User
2004 TJ Wrangler 
Join Date: May 2009
Location: Danville, California
Posts: 1,964
i chopped my banks and downturned it right after the muffler. It definatly gave it a louder/throatier sound. less pipe=more flow
2004 4.0L I6 TJ BUILD:
1997 2.4L I4 TJ BUILD:
thirdeye is offline   Reply With Quote Quick reply to this message
Unread 08-09-2010, 10:09 AM   #3
Registered User
2003 TJ Wrangler 
Join Date: May 2009
Location: The Republic of Dave
Posts: 6,408
Performance? I doubt it. The basic word on the 4.0L is that you're not going to get much more power out of it unless you're increasing displacement. The header might give you a little, but the converter is fine in stock trim.

The sound might change a little. I think you'll do more with a muffler change, though.
If it's worth doing, then it's worth [I]over[/I]doing.

The Republic of Dave: Bringing you the finest in simian testing supplies.

The build, the gear, and the mileage: [URL="http://www.jeepforum.com/forum/f22/wasteland-survival-guide-engineering-greta-1344782/"][B]The Wasteland Survival Guide[/B][/URL]
Sundowner is offline   Reply With Quote Quick reply to this message
Unread 08-09-2010, 10:26 AM   #4
Registered User
1998 TJ Wrangler 
Join Date: Oct 2008
Location: Winston-Salem, NC
Posts: 37
Tubular header will give you a bit more of an aggressive sound. Not much louder, but more defined and muscle-y sounding.
ncbluetj is offline   Reply With Quote Quick reply to this message
Unread 08-09-2010, 10:51 AM   #5
I am the Devil's advocate
TheBoogieman's Avatar
2003 TJ Wrangler 
Join Date: Aug 2006
Location: Charlottesville, Va
Posts: 30,576
Don't waste your money.The muffler is the best way to change the sound.Nothing will help the performance to any degree.
If you're offended by the opinions I express here, then you really don't want to hear the ones I keep to myself.
TheBoogieman is offline   Reply With Quote Quick reply to this message
Unread 08-09-2010, 06:22 PM   #6
AFSOC Retired
Knuckelhead's Avatar
2000 TJ Wrangler 
Join Date: Aug 2005
Location: Colorado
Posts: 18,150
You already have the best exhaust manafold you can get, the OEM one. Leave it alone...
Knuckelhead is offline   Reply With Quote Quick reply to this message

header , hi-flow , cat , exhaust , banks , monster , tj , wrangler

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com 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

Suggested Threads

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