smog test for cat
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New User
Joined: Oct 2007
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smog test for cat
I am interested in removing the cat. MVD smog test will look for the cat and fail the vehicle in my state if the cat is removed. Do all the other states check for the cat? It is usually on the hood or in the engine compartment if the truck has a cat. I have no problem removing the cat ( which I want to do ) , i just don't want to go through the exercise if I cannot smog the vehicle and register the truck. I don't want to find out at the smog station that I have to put back the original cat. Do they sell a exhaust system with a better cat?
I have a early 99 PSD build date 11/98. Help
I have a early 99 PSD build date 11/98. Help
Elder User
Joined: Sep 2007
Posts: 624
Likes: 0
From: Kalamazoo, MI
I can't think of who right off the bat, but yes, there are a couple of exhaust companies that sell a high-flow low-backpressure cat..
just a word to the wise, it is now against federal law for the owner to eliminate a catalytic convertor.
just a word to the wise, it is now against federal law for the owner to eliminate a catalytic convertor.
Last edited by JLDickmon; Nov 6, 2007 at 07:04 PM.
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
I just tried to do a search, couldnt find it, but there was a group of us that were looing under the hood, and under our trucks, if i recall correctly, several of us had a cat listed, but didnt have one.. their exhaust was stock..I am sure though if you went to something like a 4" or larger, they would catch on. But again, search this forum, you should find something to help you on this. What state are you in?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by JLDickmon
I can't think of who right off the bat, but yes, there are a couple of exhaust companies that sell a high-flow low-backpressure cat..
just a word to the wise, it is now against federal law for the owner to eliminate a catalytic convertor.
just a word to the wise, it is now against federal law for the owner to eliminate a catalytic convertor.
Elder User
Joined: Sep 2007
Posts: 624
Likes: 0
From: Kalamazoo, MI
Originally Posted by just another truck
WOW!!! So you can replace it?
comes as a new shell, low restriction monolith, blah blah blah...
you can also get severe duty ones with more catalyst plating on the strata..
Posting Guru
Joined: Nov 2006
Posts: 1,852
Likes: 1
From: house springs,mo
Originally Posted by tboyle
I am interested in removing the cat. MVD smog test will look for the cat and fail the vehicle in my state if the cat is removed. Do all the other states check for the cat? It is usually on the hood or in the engine compartment if the truck has a cat. I have no problem removing the cat ( which I want to do ) , i just don't want to go through the exercise if I cannot smog the vehicle and register the truck. I don't want to find out at the smog station that I have to put back the original cat. Do they sell a exhaust system with a better cat?
I have a early 99 PSD build date 11/98. Help
I have a early 99 PSD build date 11/98. Help
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Elder User
Joined: Sep 2007
Posts: 624
Likes: 0
From: Kalamazoo, MI
Originally Posted by medhvac
well a always thought that was a prefilter not a cat ,anyways u could remove it than take the inners out of it than put it back on so they see it!just a thought!
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