Just a quick note for those who don't quite understand.
I was reading some Q/A about catalytic converters and a few people don't quite understand what all they do. They were saying that removing the Cat would make the vehicle louder and run terrible, does not have hardly any affect as far as decibals, and you might get an error or engine light if you remove it, but the upstream O2 sensor is what the controll module uses to adjust air/fuel.
Mine was plugged, punched out the ceramic from the shell, runs great, no chk eng light, no louder. Dig Durango's!

 

I thermo-shocked mine out wheeling and the ceramic started flying out the tail pipe. No CEL for me either, however if you live somewhere with emissions testing make sure your cat is installed and fully functioning.

 

There are conditions where'as you may get lucky and not throw a code, but to come out and say we dont understand how a cat works and its fine for anyone to remove is redic.
There's plenty of reasons to run a cat, with no real reasons not too.
Money is what im expecting to hear..

 

If you read what I wrote I said: some that don't quite understand not everyone on this Forum. I am sure there are many of you that are much more knowledgable than I am about emmisions and autos in general. So if you still take offense oh well.
In my experiance anything that limits your engine from breathing whether it's intake or exhaust is a power and performance robber.
I am no environmentalist, nor do I want to harm our environment, but my Durango runs great and clean so as far as pollutting any more than the next guy I would say its all most undetectable. I was emmisions cert in Co.
It has nothing to do with $. I have a full time job as a Mechanical Engineer, not that I make great money, but that's not a factor in this case.
Thanx for everyone's input.

 

I havent had a converter for years in any of my vehicles no check engine light.

 

any computer controlled vehicle will throw a CEL if you remove the cat unless you do one of two things, put a POST CAT oxygen sensor simulator in there to make the computer think that the CAT is still functioning, or find some other way to make the post cat sensor read properly, i have heard that throwing the sensor into the frame rail and zip tying it in place will work, however doing nothing will throw a cat efficiency below threshold code.

that said, if you were an engineer you would understand what a cat does and why it is there and why it should be left there, these engines are designed to run properly with the cat there and removing it most certainly DOES change the engine parameters, each engine will be affected differently but most will run like sh*t without that there, the backpressure will change, the exhaust flowrate will change ect ect all basic stuff that engineers are taught in school

 

I'd have to agree. the cat is there for a reason