|02-26-2012, 09:10 PM||#1 (permalink)|
Join Date: Feb 2012
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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??
|02-26-2012, 09:47 PM||#2 (permalink)|
The Unscrupulous Lt. Colonel
Join Date: Mar 2011
Thanked 26 Times in 15 Posts
Ups: Little to non, you will need to have the cats removed from your PCM
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
|02-27-2012, 05:44 AM||#3 (permalink)|
1st Year of the 5th Generation
Join Date: Nov 2007
Location: North TX
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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, 5.0L, TH200, 2.56:1, 106K miles, 37 Lifetime Warranty Parts.
1989 GMC C1500 Sierra ECSB 5.7L, HM290, 3.08:1, 328K miles, 1 Lifetime Warranty Parts.
|02-28-2012, 03:17 PM||#4 (permalink)|
8th Gen Antagonist
Join Date: Mar 2009
Location: Vancouver , WA
Thanked 1,192 Times in 788 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
|03-01-2012, 09:38 AM||#5 (permalink)|
Join Date: Dec 2009
Location: Kokomo, IN
Thanked 119 Times in 86 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.
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