Flowmaster 40 on JK - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK Pics Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 12-03-2009, 03:57 PM   #1
Newb
 
Join Date: Dec 2009
Location: North Texas
Posts: 4
Flowmaster 40 on JK

I am new to this site...may be a stupid question...so I have had my JK for three years now and decided this week to go with a new muffler..wanted a more aggressive sound than the go kart stock engine..the guy at the muffler shop said he could get it tucked up nice and neat in the stock location which he did..nice clean line back there now...I did not expect any great gains in power or fuel..did not do it for that reason...I have had it on the Jeep for 2 days now..just curious if anyone else who went with this setup noticed any power loss on the bottom end..kind like less torque..or do I need to give the muffler time to break in..if mufflers do that..I have 4.10 with 35's..never semmed to be an issue before

jk2007 is offline   Quote Quick Reply
Old 12-03-2009, 07:15 PM   #2
Jeeper
 
Join Date: Jul 2008
Location: Six Lakes, MI
Posts: 462
Quote:
Originally Posted by jk2007 View Post
........I did not expect any great gains in power or fuel..did not do it for that reason...I have had it on the Jeep for 2 days now..just curious if anyone else who went with this setup noticed any power loss on the bottom end..kind like less torque..or do I need to give the muffler time to break in..if mufflers do that..I have 4.10 with 35's..never semmed to be an issue before
The stock engine performance is what it is...Indeed, the only thing you might gain is some more aggressive sound...

USAntigoon is offline   Quote Quick Reply
Old 12-03-2009, 07:18 PM   #3
Newb
 
Join Date: Dec 2009
Location: North Texas
Posts: 4
Yeah I have had it for three years...thinking now I am just hearing how weak it really is...and as far as sound goes nothig to really write home about sounds ok sitting still thats about it
jk2007 is offline   Quote Quick Reply
Old 12-03-2009, 07:29 PM   #4
Jeeper
 
Join Date: Jul 2008
Location: Six Lakes, MI
Posts: 462
Did you reviewed the other more aggressive ones like MBRP prior deciding to go with the Flowmaster..?
USAntigoon is offline   Quote Quick Reply
Old 12-03-2009, 08:02 PM   #5
Newb
 
Join Date: Dec 2009
Location: North Texas
Posts: 4
Yeah I looked at them all...will run this one awhile and see how it does and then reconsider my options
jk2007 is offline   Quote Quick Reply
Old 12-04-2009, 08:12 AM   #6
Jeeper
 
Hilldweller's Avatar
 
Join Date: Apr 2008
Posts: 4,083
Yes, it is possible to lose some torque and HP with a different can installed.
Backpressure is a balancing act. Too little and you lose the drawing effect; too much and you constrict the system.
__________________
Gone camping,
Bill

Hilldweller is offline   Quote Quick Reply
Old 12-04-2009, 09:53 AM   #7
Jeeper
 
JIMBOX's Avatar
 
Join Date: Nov 2009
Posts: 9,914
I've had the Flowmaster 40 DUAL catback for almost a year, I installed it just forward of the EVAC CAN and ran the duals back from there

It has a throaty (for a v6) sound and a nice decelerating rap

No difference in power

JIMBO

__________________
"ya gotta have class"
JIMBOX is offline   Quote Quick Reply
Reply

Tags
exhaust , flowmaster , flowmaster 40 , muffler

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
flowmaster 50 or 60 288sunny TJ General Discussion Forum 11 12-07-2009 10:41 PM
Custom Exhaust choice: Magnaflow or Flowmaster Mocaco_Luc TJ Tech Forum 10 09-10-2009 05:52 PM
Flowmaster BABDBAT TJ Tech Forum 38 01-03-2008 06:20 PM
original flowmaster 40 problem nico TJ Tech Forum 4 10-12-2006 12:47 PM
Opinion on Flowmaster 60 muffler? ironmonk TJ General Discussion Forum 13 10-08-2006 01:56 AM



» Featured Product

All times are GMT -5. The time now is 12:03 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