Removing Rear Cats - MustangForums.com



V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters

Reply
 
 
 
Thread Tools Search this Thread
Old 03-08-2007, 11:34 PM   #1
nappypalms
1st Gear Member
Thread Starter
 
Join Date: Apr 2006
Location: Houston, TX
Posts: 54
Default Removing Rear Cats

I went up to a local exhaust shop to talk to them about removing my rear catalytic converters,
and as soon as I mentioned removing cats to this guy there he freaks out and says No Way that's a $25,000 fine.

Is this true? LoL. I was thinking about removing them when I get my Mac Catback system installed.

I know that in some states it may be illegal, but I live in Texas and have seen multiple mustangs and other cars that have offroad pipes or removed cats.
nappypalms is offline   Reply With Quote
Old 03-08-2007, 11:38 PM   #2
raz54
4th Gear Member
 
Join Date: Jan 2007
Location: Eureka, Ca.
Posts: 1,758
Default RE: Removing Rear Cats

I know it is in Ca. yet I don't have rear cats. It's called 'DIY'
raz54 is offline   Reply With Quote
Old 03-08-2007, 11:39 PM   #3
jthorn9
The Godfather
 
jthorn9's Avatar
 
Join Date: Sep 2005
Location: Temple, Texas
Posts: 15,478
Default RE: Removing Rear Cats

There are some states where a shop can be fined for removing the cats, but all you have to tell them is that this will be an off/road track car only, there fore that makes it legal. That's what I had to do with my GT, and it's nothing but DD.
jthorn9 is offline   Reply With Quote
Old 03-08-2007, 11:40 PM   #4
nappypalms
1st Gear Member
Thread Starter
 
Join Date: Apr 2006
Location: Houston, TX
Posts: 54
Default RE: Removing Rear Cats

How hard is this to Do It Yourself? LoL.
nappypalms is offline   Reply With Quote
Old 03-08-2007, 11:42 PM   #5
jthorn9
The Godfather
 
jthorn9's Avatar
 
Join Date: Sep 2005
Location: Temple, Texas
Posts: 15,478
Default RE: Removing Rear Cats

Well semi easy if you can manage to get your car high enough off the ground to work on it, but you'll also need to know how to weld, because even those these systems "BOLT ON/UP" they still need to be welded together at certain points.
jthorn9 is offline   Reply With Quote
Old 03-08-2007, 11:45 PM   #6
raz54
4th Gear Member
 
Join Date: Jan 2007
Location: Eureka, Ca.
Posts: 1,758
Default RE: Removing Rear Cats

Not hard at if you can weld. I used a sawzall to cut the cats off and got some 2" pipe to fit inside the 2.25" to replace the cats. The passenger side cat had the 02 bung in the cat so that side needed a bung. If you can't weld do as jthorn9 suggested and tell them it's going to be a race car and used off road only.
raz54 is offline   Reply With Quote
Old 03-08-2007, 11:50 PM   #7
nappypalms
1st Gear Member
Thread Starter
 
Join Date: Apr 2006
Location: Houston, TX
Posts: 54
Default RE: Removing Rear Cats

I'll have to try the Off road/track use story haha I don't know how to weld yet.

Do ya'll think removing the rear cats would make the mac catback any louder?

Thanks for the suggestions guys.
nappypalms is offline   Reply With Quote
Old 03-09-2007, 01:48 AM   #8
raz54
4th Gear Member
 
Join Date: Jan 2007
Location: Eureka, Ca.
Posts: 1,758
Default RE: Removing Rear Cats

It made my exhaust louder. Those rear cats are the biggest cats in the system so getting rid of them really helps with the sound.
raz54 is offline   Reply With Quote
Old 03-09-2007, 02:56 AM   #9
MustangMike2001
4th Gear Member
 
MustangMike2001's Avatar
 
Join Date: Sep 2006
Location: Nashville, TN
Posts: 1,164
Default RE: Removing Rear Cats

Would the car still pass emissions with just the front two cats on it?
MustangMike2001 is offline   Reply With Quote
Old 03-09-2007, 03:32 AM   #10
cominus
5th Gear Member
 
cominus's Avatar
 
Join Date: Dec 2006
Location: North Carolina
Posts: 2,221
Default RE: Removing Rear Cats

Quote:
ORIGINAL: MustangMike2001

Would the car still pass emissions with just the front two cats on it?
Probably not, but it will help reduce some pollution.
cominus is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2013-2014 Borla ATAK Axlebacks. FivePointToTheOh Parts For Sale 7 10-02-2015 04:09 PM
Cam and rear end gear questions Ryan Fitzpatrick New Member Area 3 09-14-2015 02:21 AM
The Future of my GT vintageaion 2005-2014 Mustangs 2 09-08-2015 10:45 AM
Boston S85 Speakers - Pair Doogie65 Parts For Sale 0 09-06-2015 02:55 PM
Video - 2015 Steeda Mustang Product Testing (Prototype Suspension Parts) [email protected] Steeda Autosports 0 09-01-2015 08:16 PM


Tags
96, 99, benefits, cats, cobra, dual, gt, mustang, mustangs, remove, removing, s197, taking, v6, welded

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump


All times are GMT -5. The time now is 01:14 AM.