Borla on a 4.2?? - JeepForum.com
Search  
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 > YJ Wrangler Technical Forum > Borla on a 4.2??

Savvy/Currie Aluminum Control ArmsROCK BOTTOM prices on LIFT KITS at Rockridge4wd!! WANT TO December Specials at Jeephut.com

Reply
Unread 06-28-2011, 07:52 PM   #1
Collin89Sahara
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2011
Location: Frisco, Il
Posts: 1,375
Borla on a 4.2??

How do you feel about the cat back system for the 4.2L??

Collin89Sahara is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 07:58 PM   #2
4.7stroker
Registered User
1988 YJ Wrangler 
 
Join Date: Apr 2007
Location: Rio Rancho NM
Posts: 4,299
A whole lot of money for very little gain.

Dwayne
4.7stroker is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 08:28 PM   #3
Collin89Sahara
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2011
Location: Frisco, Il
Posts: 1,375
Do you run an exhaust? If so what system?
Collin89Sahara is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 08:43 PM   #4
jeep16
Registered User
1990 YJ Wrangler 
 
Join Date: Feb 2010
Location: long island
Posts: 211
i run a dynomax super turbo exhaust. it is just loud enough,,, and it sounds great. i would highly recommend it.
jeep16 is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 08:50 PM   #5
Collin89Sahara
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2011
Location: Frisco, Il
Posts: 1,375
Butt dyno gains??
Collin89Sahara is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 08:51 PM   #6
jeep16
Registered User
1990 YJ Wrangler 
 
Join Date: Feb 2010
Location: long island
Posts: 211
probably a couple horses and a couple pound feat. its alot better if you also run a header.
jeep16 is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 08:57 PM   #7
Collin89Sahara
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2011
Location: Frisco, Il
Posts: 1,375
I don't have the money for the headers as I am going to do other mods. I deffinitley know that headers would yield more gains because stocks headers are clunky and restrictive.. The designs of headers on the market are good but certainly could become better. Header length, way header is bent, diameter of the tubes in certain places, and most inportant the material... Hmmm maybe new header design if I could weld!!!
Collin89Sahara is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 09:02 PM   #8
jeep16
Registered User
1990 YJ Wrangler 
 
Join Date: Feb 2010
Location: long island
Posts: 211
you can get a header for around 350 and a dynomax for around 140. not too much more than a borla. its all up to you though. i am running a pacesetter header with the dynomax and a 2 barrel empi carb. low end torque is great.
jeep16 is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 09:06 PM   #9
4.7stroker
Registered User
1988 YJ Wrangler 
 
Join Date: Apr 2007
Location: Rio Rancho NM
Posts: 4,299
For $500 you can install a 4.0 head and cheap manifold and gain wayyy more than you ever would by fooling with the exhaust.

Dwayne
4.7stroker is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 09:08 PM   #10
jbolty
Moderator
 
jbolty's Avatar
1990 YJ Wrangler 
 
Join Date: Jun 2007
Location: San Diego, CA
Posts: 16,060
I got a borla header for super cheap but I would not spend retail money on it. There was a little noticeable gain in HP but not enough to worry about
__________________
.
"The right to be heard does not necessarily include the right to be taken seriously." —Hubert Humphrey
.
If you live within wheeling distance of San Diego county, click here
jbolty is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 09:16 PM   #11
Collin89Sahara
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2011
Location: Frisco, Il
Posts: 1,375
I mainly want it for sound, my friend has the borla on his YJ, it sounds great. I have thought about the 4.0L head, but I have other mods that to do. But if I do have the $ for the head. What goes into putting the new head on? I don't have to rewire anything do I?
Collin89Sahara is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 09:24 PM   #12
4.7stroker
Registered User
1988 YJ Wrangler 
 
Join Date: Apr 2007
Location: Rio Rancho NM
Posts: 4,299
I am not in the camp of throwing a lot of money at things to make them sound good, no gain =no cash from me.

Dwayne
4.7stroker is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 09:31 PM   #13
Collin89Sahara
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2011
Location: Frisco, Il
Posts: 1,375
Dwayne what are the steps in order to replace 258 heads with the 242 heads?
Collin89Sahara is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 09:36 PM   #14
4.7stroker
Registered User
1988 YJ Wrangler 
 
Join Date: Apr 2007
Location: Rio Rancho NM
Posts: 4,299
http://www.northeastsurf.com/4.0%20head%20swap.htm

Dwayne
4.7stroker is offline   Reply With Quote Quick reply to this message
Unread 06-28-2011, 09:55 PM   #15
Collin89Sahara
Registered User
1989 YJ Wrangler 
 
Join Date: Jun 2011
Location: Frisco, Il
Posts: 1,375
That's a great build up, It has sat in the back of my mind for the month that I have owned my jeep to be able to do this type of modification. When pay day comes, working all summer I will have money in hand then, it will be something that I will have to consider and sleep on. Do you think it would be easy for someone that has never torn into an engine?
Collin89Sahara is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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


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.