catalytic replaced with 2 foot pipe?? help!!! - Chevy Impala Forums
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 02-26-2012, 10:10 PM Thread Starter
Junior Member
 
phatboy's Avatar
 
Join Date: Feb 2012
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
catalytic replaced with 2 foot pipe?? help!!!

i got a 95 ss with bad cats and a buddy of mine said i could get them cut off and replaced (cut and weld) with a 2 foot pipe or get them gutted will this ruin anything mechanically?? what are the ups and downs of doing this??
phatboy is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 02-26-2012, 10:47 PM
The Unscrupulous Lt. Colonel

 
Crime Scene's Avatar
 
Join Date: Mar 2011
Posts: 1,077
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 26 Times in 15 Posts
Ups: Little to non, you will need to have the cats removed from your PCM


Downs:

Wont pass emissions
Exhaust will occasionally stink
Violation of Federal Law




Honestly you come off in the better end of simply replacing them with new ones. And this is coming from a person that does not have cats as well. Not by choice, last owner cut them off for some reason. No since in gutting them, cause they will sound like crap.

2001 Chevy Impala 3.4 - Traded
2004 Chevy Impala 3.4 - Traded
2002 Chevy Impala 3.4 - RIP 1.12.2011/ Ice Storm
1996 Chevy Impala SS - RIP 4.15.2012/ Asswipe
1996 Chevy Impala SS - Current
Crime Scene is offline  
post #3 of (permalink) Old 02-27-2012, 06:44 AM
1st Year of the 5th Generation

 
77Impala's Avatar
 
Join Date: Nov 2007
Location: North TX
Posts: 6,953
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Thanks: 443
Thanked 414 Times in 263 Posts
Garage
To add to above a few have even lost mpg's by removing them. A good friend of mine lost 3 mpg by removing his and his truck did not get that good before the removal. Older cars it did not matter and IMO on carburetor cars I think they are a waste.

If your cats are plugged you need to make sure you are not having misfires and that you are not dumping raw fuel into the exhaust system.


1977 Chevrolet Impala Sedan, 305, TH200, 2.56:1, 111K miles, 37 Lifetime Warranty Parts.
1989 GMC C1500 Sierra ECSB 350, HM290, 3.08:1, 343K miles, 23 Lifetime Warranty Parts.
Texas Automotive Part Finder Service
77Impala is offline  
post #4 of (permalink) Old 02-28-2012, 04:17 PM
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,655
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 517
Thanked 1,226 Times in 803 Posts
Also if you are burning any oil, that would be another cause.

1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is offline  
post #5 of (permalink) Old 03-01-2012, 10:38 AM
aka IMPALER
 
ekm1190's Avatar
 
Join Date: Dec 2009
Location: Kokomo, IN
Posts: 3,174
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 38
Thanked 138 Times in 97 Posts
There's also no power gain in our cars when removing the cats (on a stock system). Tests have shown the only significant difference it will make is in the sound.

PLEASE LIKE Hoosier Impala & Caprice Club
Check out my build thread:"Impala SSX Build"
Follow me on Instagram @emcsquared90

ekm1190 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Impala Forums 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 email address for yourself.

Email Address:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
exhaust pipe size chevyrules05 Chevy Impala 8th Gen Discussion 5 03-12-2012 10:28 PM
tail pipe alignments ssety Chevy Impala 6th Gen Discussion 1 02-15-2011 12:29 AM
Turbo crossover Pipe 85camarojunkie Forced Induction 2 10-22-2009 06:00 PM
Fuel Pipe Germanboy Chevy Impala 7th Gen Discussion 10 10-01-2009 08:38 AM
Looking for export pipe aSSaSSin Chevy Impala 6th Gen Discussion 3 09-04-2009 09:15 AM

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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome