LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Is there such a thing as a universal cat?

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Old 03-31-2009, 10:26 PM
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Default Is there such a thing as a universal cat?

Just wondering cuz Im getting lts and TD's dumped, 2.5". Im doing emmissions friendly only cuz I don't wanna go through the hassle of deleting AIR and EGR only to have to install it again for smog time.

I was just wondering if I can get any universal high flow cat and will they work?

what kind do you recomend?

do I NEED cats? itll still have AIR and EGR...

Im gonna find someone in cali to see if theyll pass it and if I cant find someone, Im gonna swap everything to stock to smog and reinstall headers and td's.

Thanks people.
Old 03-31-2009, 10:32 PM
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Originally Posted by Z28_LT1
Just wondering cuz Im getting lts and TD's dumped, 2.5". Im doing emmissions friendly only cuz I don't wanna go through the hassle of deleting AIR and EGR only to have to install it again for smog time.

I was just wondering if I can get any universal high flow cat and will they work?
When my stock cat went south, a local shop welded up a "universal" cat,
with no issues with regard to emissions (the shop had it inspected after
installing the cat). I've since replaced the exhaust manifolds with headers
and the dual cats (from Kooks - consider those high-flow cats) and have
zero issues with emissions test results.
Old 03-31-2009, 10:37 PM
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well, here in CA, I won't get past visual cuz of the LTs. Im just asking becasue I need to know if I even need them since the headers have emmissions on them. And if I do, what kind of high flows are best for price. Thx for quick info.
Old 03-31-2009, 10:38 PM
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Originally Posted by Z28_LT1
Just wondering cuz Im getting lts and TD's dumped, 2.5". Im doing emmissions friendly only cuz I don't wanna go through the hassle of deleting AIR and EGR only to have to install it again for smog time.

I was just wondering if I can get any universal high flow cat and will they work?

what kind do you recomend?

do I NEED cats? itll still have AIR and EGR...

Im gonna find someone in cali to see if theyll pass it and if I cant find someone, Im gonna swap everything to stock to smog and reinstall headers and td's.

Thanks people.


Pypes

Catco

Random Tech

Dynomax

Magna flow

All make high flow cats along with other companys
Old 03-31-2009, 10:40 PM
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Originally Posted by Z28_LT1
well, here in CA, I won't get past visual cuz of the LTs. Im just asking becasue I need to know if I even need them since the headers have emmissions on them. And if I do, what kind of high flows are best for price. Thx for quick info.
No idea how your **** state is about that, Id honestly just switch all the stock stuff back on when you go.


Id also do highflow cats with the true dauls just in case you get pulled over, they see you have cats in place.

Thats just going off of what im told about cali and how strict they are.
Old 03-31-2009, 11:10 PM
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I wouldn't call it ****, just a pain in the *** with all the rules is really what it is. Im more D, but Pelosi is a crazed lunatic and I hate her. To tell you the truth, I think we need more R influance....but....thats not what this tread is about.

Ok so I can get any 2.5" cat and weld that in, cool.

Do you think I can take my car and register it in another state like AZ and pass emmissions there (not sure if Lts and TD's are legal, but if they were...) then drive it back to Cali or could i get into major trouble?
Old 03-31-2009, 11:24 PM
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Just make sure its a high flow cat, you dont want one that is a normal one that will choke the exhaust flow.

Check out what ive posted it should be what your looking for
Old 03-31-2009, 11:26 PM
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Originally Posted by Z28_LT1
I wouldn't call it ****, just a pain in the *** with all the rules is really what it is. Im more D, but Pelosi is a crazed lunatic and I hate her. To tell you the truth, I think we need more R influance....but....thats not what this tread is about.

Ok so I can get any 2.5" cat and weld that in, cool.

Do you think I can take my car and register it in another state like AZ and pass emmissions there (not sure if Lts and TD's are legal, but if they were...) then drive it back to Cali or could i get into major trouble?
Ive known people that have reg there cars in other states and have done that. It works, but id just honestly throw on the stock exhaust.


I know around here any car older than 1996 now doesnt need emissons
Old 03-31-2009, 11:28 PM
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I have a high flow cat that I'm going to sell! I'm not sure the brand at the moment but I think it may be a random Tech, I'll have to check, anyway I'm going true duals. I'll hit you up when I get home from work if your interested!
Old 04-01-2009, 03:08 PM
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Originally Posted by slick1851
Ive known people that have reg there cars in other states and have done that. It works, but id just honestly throw on the stock exhaust.


I know around here any car older than 1996 now doesnt need emissons

where u live man, Im there... lol

What brands the best bang for the buck?
Old 04-01-2009, 05:35 PM
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I live in Cali man. LT's and high flow cat's are definitely ILLEGAL in CA. They recently passed a law making it illegal to sell universal/high-flow cats to CA residents. You have to buy CARB (California Air and Resource Board) approved OBDII catalytic converters that usually cost ~350 a piece.

Now I have PS LT's, !cats, !AIR, !EGR. You just have to find a shop that will charge you more to pass you.
Old 04-01-2009, 05:39 PM
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Go to the MAGNAFLOW Website.....lot's of them there....
Old 04-01-2009, 05:40 PM
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Originally Posted by NHRAMAN
Go to the MAGNAFLOW Website.....lot's of them there....
But they can't ship to CA anymore.
Old 04-01-2009, 05:42 PM
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Originally Posted by ss.slp.ls1
I live in Cali man. LT's and high flow cat's are definitely ILLEGAL in CA. They recently passed a law making it illegal to sell universal/high-flow cats to CA residents. You have to buy CARB (California Air and Resource Board) approved OBDII catalytic converters that usually cost ~350 a piece.

Now I have PS LT's, !cats, !AIR, !EGR. You just have to find a shop that will charge you more to pass you.
It is also illegal to reposition the cats from their stock location(s).
Old 04-01-2009, 05:45 PM
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Originally Posted by ss.slp.ls1
But they can't ship to CA anymore.
...HAHAHAHA......O Well.....
Old 04-01-2009, 06:24 PM
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Originally Posted by SS RRR
It is also illegal to reposition the cats from their stock location(s).
Only in some neo **** cali like state, ive never heard of anyone being botherd around here like that....




Im from chicago, we always find a way around the rules
Old 04-02-2009, 02:14 PM
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Hmm, I got a way around that crazy law...
Old 04-02-2009, 02:22 PM
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Originally Posted by slick1851
Only in some neo **** cali like state, ive never heard of anyone being botherd around here like that....




Im from chicago, we always find a way around the rules
No... It's pretty much illegal everywhere, but there are those areas that don't bother dealing with it or don't care or don't have a clue nor do they want one...
Old 04-02-2009, 06:05 PM
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Quick question: will OBDI cats read on my OBDII without any modification? just hook right up?
Old 04-02-2009, 06:07 PM
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Originally Posted by SS RRR
No... It's pretty much illegal everywhere, but there are those areas that don't bother dealing with it or don't care or don't have a clue nor do they want one...
I never said it was


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