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Catalytic Converter Removal/Bypass

Old 03-30-2012, 08:55 AM
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Join Date: Jan 2012
Posts: 16
Default Catalytic Converter Removal/Bypass

Hey everyone,

I have a 95 Monte Carlo Z34, and was wondering if I should eliminate my catalytic converter on my car, and weld in a straight piece of piping.

I know the car only has an upstream O2 sensor so this shouldn't really be a problem should it?

Also, will the car benefit from this?

Thanks everyone for your responses!
Old 03-30-2012, 09:20 AM
ChibiBlackSheep's Avatar

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It's illegal and if you have even just visual emissions inspections in your state you will fail. Also a lot of exhaust shops could be fined up to $10k doing this for someone.

IDK how OBD-1 cars handle the cat being gone though.
Old 03-30-2012, 09:01 PM
Join Date: Sep 2011
Location: Minnesota
Posts: 370

You shouldn't have any codes pop up from doing it. Its gonna have to be done by you though, the majority of shops will laugh at you when asking them to do it .
Old 03-30-2012, 09:16 PM
Join Date: Feb 2012
Location: Maryland
Posts: 415

just gut the thing out
Old 03-31-2012, 12:13 AM
red04montels's Avatar
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why are you wanting to remove the cat to begin with?

Is it bad? The car will be pretty loud without it and like Chibi stated, you will fail emissions
Old 03-31-2012, 08:38 AM
Join Date: Dec 2008
Location: Hazleton, PA
Posts: 442

if you need to replace it..just pick up a magnaflow high flow...they are only like 70 bucks..but worth it...
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