will this setup pass emmissions
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Joined: Dec 2003
Posts: 170
From: Chicago
will this setup pass emmissions
another question for the wide knowledge of post members, i have stock headers on my 99 ls1 but i just swapped the magnaflow exhaust for the loudmouth exhaust (chessy smile) now i am thinking of just straight gutting the cats for better flow,now my questions are will this increase the sound level (if gutted right) i mean or tougher muscle sound and will the gutted cats be able to pass emissions with the loud mouth?? your expertise would be great to have.Oh if your wondering,idont know if this makes a differnace or not but i live in nw indiana (borders chicago) so i dont know how tough the emmisions are
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Joined: Apr 2003
Posts: 147
From: Lexington, KY
Umm well two things.
Firstly, gutting the cats with a loudmouth is going to make the car sound raspy and poppy, not muscular.
Secondly, you will fail emissions testing 100% if you gut the cats. The cats are what cleans the exhaust so it's less harmful to the enviornment. Gutting them removes the part that cleans the exhaust so you're going to be pooring pure exhaust into the environment.
So in answer to your questions, you will fail emissions and your car will become raspy and poppy sounding.
Firstly, gutting the cats with a loudmouth is going to make the car sound raspy and poppy, not muscular.
Secondly, you will fail emissions testing 100% if you gut the cats. The cats are what cleans the exhaust so it's less harmful to the enviornment. Gutting them removes the part that cleans the exhaust so you're going to be pooring pure exhaust into the environment.
So in answer to your questions, you will fail emissions and your car will become raspy and poppy sounding.
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Joined: Dec 2003
Posts: 170
From: Chicago
Originally posted by LS1-Maniac
Umm well two things.
Firstly, gutting the cats with a loudmouth is going to make the car sound raspy and poppy, not muscular.
Secondly, you will fail emissions testing 100% if you gut the cats. The cats are what cleans the exhaust so it's less harmful to the enviornment. Gutting them removes the part that cleans the exhaust so you're going to be pooring pure exhaust into the environment.
So in answer to your questions, you will fail emissions and your car will become raspy and poppy sounding.
Umm well two things.
Firstly, gutting the cats with a loudmouth is going to make the car sound raspy and poppy, not muscular.
Secondly, you will fail emissions testing 100% if you gut the cats. The cats are what cleans the exhaust so it's less harmful to the enviornment. Gutting them removes the part that cleans the exhaust so you're going to be pooring pure exhaust into the environment.
So in answer to your questions, you will fail emissions and your car will become raspy and poppy sounding.
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Joined: Feb 2003
Posts: 42
From: San Antonio
Exactly what he said ^ (Ls1-Maniac i mean)
You would not at all be able to pass a sniffer test. Most likey a visual test since the cats are technically still there. Just look up and see what your states inspection requires.
Its not even worth it to gut the cats, there is practically no performance gains with a stock manifolded car, and it'll only sound raspier especially through the Loudmouth. Save up for some longtube headers.
I run Longtubes and an Off road Y pipe through borla, a little raspy but a badass sound none the less...
Cliffnotes - don't gut cats.
You would not at all be able to pass a sniffer test. Most likey a visual test since the cats are technically still there. Just look up and see what your states inspection requires.
Its not even worth it to gut the cats, there is practically no performance gains with a stock manifolded car, and it'll only sound raspier especially through the Loudmouth. Save up for some longtube headers.
I run Longtubes and an Off road Y pipe through borla, a little raspy but a badass sound none the less...
Cliffnotes - don't gut cats.
Last edited by Drew98; Mar 23, 2004 at 06:05 PM.
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Joined: Feb 2003
Posts: 42
From: San Antonio
Originally posted by redzsmoked212
Poppy and rasspy sounding i really dont understand what that really is there anyway you can explain that sound to me,even if i do gut them basically wouldnt that be almost as free-flowing as a off road y just not as big,in diameter i mean??
Poppy and rasspy sounding i really dont understand what that really is there anyway you can explain that sound to me,even if i do gut them basically wouldnt that be almost as free-flowing as a off road y just not as big,in diameter i mean??
Drew
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