Afe exhaust - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > General Jeep Discussions > Exhaust and Headers

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 05-25-2012, 12:46 PM
Thread Starter
  #1
Jeeper
 
Join Date: Feb 2012
Posts: 17
Afe exhaust

I am fixing to order a afe cat back system for my 12 jku. I see they offer 2.5 and 3 inch systems. Does anybody have the 3 inch. Is it better to go bigger or not. The 2.5 is a little cheaper. I am just wondering if the 3 inch is worth the extra $. Thanks

meltek is offline   Quote
Old 05-25-2012, 12:50 PM   #2
Jeeper
 
Mopar2Ya's Avatar
 
Join Date: Jan 2012
Location: Earth
Posts: 873
https://www.wranglerforum.com/f33/afe...on-137259.html

I have the 2.5" muffler in the rear & like it. I not sure about the 3", loss of tq could be possible.

__________________
2012 JK U R Crush (Specs in profile)
Pics: http://s1243.photobucket.com/profile/mopar2ya2/index
2006 GC(WK) SRT8 gone
1970 Charger R/T somewhere in pieces
Mopar2Ya is offline   Quote
Old 05-26-2012, 03:35 AM   #3
Jeeper
 
chim-chim7's Avatar
 
Join Date: Apr 2012
Location: Lakeside, California
Posts: 694
The aFe intake actually provides bigger HP and torque gains than their exhaust does. I want that exhaust for my 2012 also! I am going with 2.5" Dont want to trade torque for more horsepower.
chim-chim7 is offline   Quote
Sponsored Links
Advertisement
 
Old 05-26-2012, 05:28 AM   #4
Jeeper
 
fishmd's Avatar
 
Join Date: Dec 2011
Location: South Florida
Posts: 338
I am planning on getting the 2.5" very soon here. I spoke with the manufacturer. They told me not to get the 3" due to loss of low end torque. Makes sense to me.
fishmd is offline   Quote
Old 05-26-2012, 10:23 AM   #5
Jeeper
 
fishmd's Avatar
 
Join Date: Dec 2011
Location: South Florida
Posts: 338
Also, when I called AFE this last week they offered to sell me the 49-46212 model for the 4 door for 330$ shipped.
fishmd is offline   Quote
Old 05-26-2012, 11:44 AM   #6
Jeeper
 
agoldxj's Avatar
 
Join Date: Sep 2011
Location: Turbotville, PA 17772
Posts: 957
I have the 3" system on my 3.8. I really like the sound of it compared to alot of the clips I've heard online.
__________________
2012 JKUR call of duty.
agoldxj is offline   Quote
Old 06-05-2012, 07:59 PM
Thread Starter
  #7
Jeeper
 
Join Date: Feb 2012
Posts: 17
Quick question. When installing the new system are the clamps good. Or are yall welding the connections
meltek is offline   Quote
Old 06-05-2012, 08:32 PM   #8
Jeeper
 
PieFace's Avatar
 
Join Date: Jan 2012
Posts: 1,307
The rubber things that hold the stock exhaust in place will work with the AFE set up. The hangers are identical to stock. There is no welding or anything. You just pull the OEM exhaust out, we took it out with the hangers, then put the hangers on the AFE unit and put it back in.

Super Simple.
__________________
JeepLab's Black Betty SuperCharged JK is now for SALE! PM me if your interested.
PieFace is offline   Quote
Old 06-05-2012, 08:36 PM   #9
Jeeper
 
datman's Avatar
 
Join Date: Jun 2011
Posts: 24
I actually added a small welded bead around the seam.. No need to, but thought it might be added protection. I don't like fumes. Might be a bit tricky to take off though..
datman is offline   Quote
Old 06-30-2012, 11:07 AM   #10
Jeeper
 
PieFace's Avatar
 
Join Date: Jan 2012
Posts: 1,307
No torque loss

Ive had both exhausts, the 2.5 and 3.0 inch exhaust units from AFE, and Ill tell you that the 3 inch unit has no torque loss from the 2.5. I was expecting to feel a difference, and did not. The low end grunt is definatly still there. And the 3.0 inch exhaust is less "in your face" with the sound.

Im not saying one is better than the other, but i would say that it comes down to your sound prefrence more than anything else. The 2.5 unit's muffler is TINY. you can see pics of it on jeeplab.com and also there are sound bites of both on youtube.

2012 Jeep Stock Exhaust vs Afe 3.0 49-46222 - YouTube

2012 WRANGLER EXHAUST.wmv - YouTube
__________________
JeepLab's Black Betty SuperCharged JK is now for SALE! PM me if your interested.
PieFace is offline   Quote
Old 06-30-2012, 11:46 AM   #11
Jeeper
 
allblackedout's Avatar
 
Join Date: Jun 2012
Posts: 660
sorry to hijack your thread but why would there be torque loss from the 3"? iv been looking around at different exausts to put on my 11JKU but im not looking to lose any torque or anything. anyone care to explain?
__________________
no doors no problem
allblackedout is offline   Quote
Old 06-30-2012, 12:05 PM   #12
Jeeper
 
PieFace's Avatar
 
Join Date: Jan 2012
Posts: 1,307
Quote:
Originally Posted by allblackedout View Post
sorry to hijack your thread but why would there be torque loss from the 3"? iv been looking around at different exausts to put on my 11JKU but im not looking to lose any torque or anything. anyone care to explain?
The 3" diameter pipe is larger than the 2.5 inche stock pipe. It's like water going through a hose, if you squeeze the hose the water moves faster, if the hose was to get larger somehow the water would move slower.

The torque comes from "backpressure" a 3.0 inch exhaust should have less backpressure, so in theory it should lose some torque, this lack of back pressure helps in high end power.

We as jeepers want that low end punch. High end is nice, but for our purposes low end is far more useful.

I should also mention that I had the 2.5" inch Afe exhaust with the muffler in the far rear of the truck, the 3 inch I had was the muffler relocation unit. That means that the muffler was relocated under the driver's seat, so the 3.0 inch tube was only for about 5 inches until it hit the muffler.

Afe also makes a 3 inch exhaust that has the muffler all the way in the stock muffler location, that means that the exhaust would travel the entire length of the truck before hitting the muffler.

The relocated muffler unit, may be the reason there is no torque loss with the 3 inch exhaust unit. (as the exhaust really isnt going very far before it hits the muffler)

Ill post some pictures so you can see what I mean about the distance between the muffler and the stock 2.5 inch pipe.
__________________
JeepLab's Black Betty SuperCharged JK is now for SALE! PM me if your interested.
PieFace is offline   Quote
Old 05-07-2015, 10:18 PM   #13
Newb
 
Join Date: Mar 2014
Posts: 4
afe exhaust

Hello all. I put a 2.5" AFE mach force hi tuck exhaust on my 2014 Wrangler Rubicon. I also added the AFE CAI, Throttle body spacer, loop delete kit and Y pipe. Keep in mind these were my first mods ever in my life to my first Jeep ever.

I like the sound but purchased this for increased efficiency. Yet my average mpg has decreased about 2mpg.

Should I have not done the loop delete?

Any thoughts are appreciated. Thanks!
__________________
Brian M. White
Be Prepared
Bianchi775 is offline   Quote
Old 05-08-2015, 12:28 AM   #14
Jeeper
 
Join Date: Oct 2014
Location: Michigan
Posts: 412
Take that throttle body spacer off and throw it in the trash. A spacer on a dry intake( no fuel in the intake) does absolutely nothing expect lighten your wallet.
__________________
2014 JKR
JTB488 is offline   Quote
Old 05-08-2015, 02:36 AM   #15
Jeeper
 
millbillie's Avatar
 
Join Date: Jan 2015
Posts: 257
A lighter wallet would put less load on the motor so efficiency should have improved
millbillie is offline   Quote
Old 05-09-2015, 08:19 AM   #16
Newb
 
Join Date: Mar 2014
Posts: 4
Thank you JTB488! I will take that off and see how it goes.

Bianchi775 is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not 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






All times are GMT -5. The time now is 07:15 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.