!AIR with Cats, bad idea?
Thread Starter
Launching!
Joined: May 2004
Posts: 260
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!AIR with Cats, bad idea? I have a 98, and I'll be adding a LS6 intake, and a set of LT's, (carsound cats ~probably~) X=pipe, out the back...
I'll be taking the EGR out obviosly, but I'm uncertain what would be the BEST option with the AIR?
Take it out... cleans the engine bay up a little, slight weight reduction, race style headers....
BUT, I'm gonna throw some carsound cats on the exhaust for a less chance of rasp, and fumes and what not... with that though, how bad of a idea is it to keep the cats, and do the !AIR???
I'll be taking the EGR out obviosly, but I'm uncertain what would be the BEST option with the AIR?
Take it out... cleans the engine bay up a little, slight weight reduction, race style headers....
BUT, I'm gonna throw some carsound cats on the exhaust for a less chance of rasp, and fumes and what not... with that though, how bad of a idea is it to keep the cats, and do the !AIR???
Originally Posted by LeddySS98
I have a 98, and I'll be adding a LS6 intake, and a set of LT's, (carsound cats ~probably~) X=pipe, out the back...
I'll be taking the EGR out obviosly, but I'm uncertain what would be the BEST option with the AIR?
Take it out... cleans the engine bay up a little, slight weight reduction, race style headers....
BUT, I'm gonna throw some carsound cats on the exhaust for a less chance of rasp, and fumes and what not... with that though, how bad of a idea is it to keep the cats, and do the !AIR???
I'll be taking the EGR out obviosly, but I'm uncertain what would be the BEST option with the AIR?
Take it out... cleans the engine bay up a little, slight weight reduction, race style headers....
BUT, I'm gonna throw some carsound cats on the exhaust for a less chance of rasp, and fumes and what not... with that though, how bad of a idea is it to keep the cats, and do the !AIR???
I don't think it'll ruin your cats. AIR to help with emissions when the cats get too cool, like on startup and maybe sitting at a light which is a tiny fraction of the time you spend driving your car.
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Thread Starter
Launching!
Joined: May 2004
Posts: 260
Likes: 0
I'm not a tree hugger 
I just wanted to know what the downside of not having the AIR hooked up if you still run cats...
What's considered a "bad" cat? do they get plugged up or something?
I guess I'm just trying to find out if its 'Dumb' on my part to put in new cats, but take the AIR system out.
I just wanted to know what the downside of not having the AIR hooked up if you still run cats...What's considered a "bad" cat? do they get plugged up or something?
I guess I'm just trying to find out if its 'Dumb' on my part to put in new cats, but take the AIR system out.
TECH Enthusiast
Joined: Jan 2004
Posts: 736
Likes: 0
From: Texas is home; Sasebo Japan for now :(
Originally Posted by LeddySS98
I'm not a tree hugger I just wanted to know what the downside of not having the AIR hooked up if you still run cats...
What's considered a "bad" cat? do they get plugged up or something?
I guess I'm just trying to find out if its 'Dumb' on my part to put in new cats, but take the AIR system out.
I just wanted to know what the downside of not having the AIR hooked up if you still run cats...What's considered a "bad" cat? do they get plugged up or something?
I guess I'm just trying to find out if its 'Dumb' on my part to put in new cats, but take the AIR system out.
TECH Regular
Joined: Feb 2003
Posts: 430
Likes: 0
From: Pasadena, CA
I've posted this same question before. Some people say !AIR is not good for the cats, and some say it doesn't matter. Since there was not a clear cut answer, I played it safe and left the AIR system.
TECH Resident
Joined: Mar 2003
Posts: 770
Likes: 0
From: Troy Al
Originally Posted by Pimp_Nas_T
the !air mod will not hurt the cats. It will just take longer for the cats to light off from a cold start. Unless you are hugging trees, i wouldn't worry about it.
Ditto.
People get aftermarket cats and stock ones mixed up.
The stockones will die if you have to air to them but aftermarket ones are not dependent on it.
I asked the same questions as I was getting my Headers, and I went with QTP Raceheaders with No air. On Barrys recomendations at that.
