i would think it would be more then 1 hp, maybe 1 hp from certain metalic highflow cats to none, but 5-6 from stock cats to none
Cat's or Not?????
Thread Starter
Melting Slicks
Joined: Oct 2010
Posts: 2,314
Likes: 4
From: Cape May, NJ; Guntersville, AL; Orange Beach, AL
Cat's or Not?????
I tried searching but didn't find a whole lot on the subject. I'm going to get LG superpro 1 3/4" headers and I was wondering if I should go with cats or not? I just want everyones opinion on the matter. I live in NJ but my car is registered in AL so no smog tests for me. Is there any benefit to running W/O cats vs. with them? Will this make my exhaust blacker or dirtier than with cats? Will this do anything for performance? Lastly, I will be getting a tune but will there be any effects on the engine? Thanks for all the help guys
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
I tried searching but didn't find a whole lot on the subject. I'm going to get LG superpro 1 3/4" headers and I was wondering if I should go with cats or not? I just want everyones opinion on the matter. I live in NJ but my car is registered in AL so no smog tests for me. Is there any benefit to running W/O cats vs. with them? Will this make my exhaust blacker or dirtier than with cats? Will this do anything for performance? Lastly, I will be getting a tune but will there be any effects on the engine? Thanks for all the help guys
Instructor
Joined: Jul 2006
Posts: 233
Likes: 0
From: Redondo Beach CA
Let me put it this way, the difference on the dyno of my car with and without cats was approximately 1 HP. And that was the most difference I saw.
I've got Borla headers, which are basically the same thing as LG headers since they used to manufacture all of the LG stuff.
I'd rather be environmentally responsible and run the cats given the absolutely negligible performance difference between running with or without them.
And honestly my car stunk to high hell without them, while I was waiting to get them welded up.
I've got Borla headers, which are basically the same thing as LG headers since they used to manufacture all of the LG stuff.
I'd rather be environmentally responsible and run the cats given the absolutely negligible performance difference between running with or without them.
And honestly my car stunk to high hell without them, while I was waiting to get them welded up.
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
Let me put it this way, the difference on the dyno of my car with and without cats was approximately 1 HP. And that was the most difference I saw.
I've got Borla headers, which are basically the same thing as LG headers since they used to manufacture all of the LG stuff.
I'd rather be environmentally responsible and run the cats given the absolutely negligible performance difference between running with or without them.
And honestly my car stunk to high hell without them, while I was waiting to get them welded up.
I've got Borla headers, which are basically the same thing as LG headers since they used to manufacture all of the LG stuff.
I'd rather be environmentally responsible and run the cats given the absolutely negligible performance difference between running with or without them.
And honestly my car stunk to high hell without them, while I was waiting to get them welded up.
with what you might see on a dyno, but i said faster.... real 1/4 mile racing, and tuned just for that, and don't forget the weight savings, and even a better weight transfer,
Racer
Joined: Aug 2008
Posts: 377
Likes: 0
From: Lyndhurst Ohio
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
Thread Starter
Melting Slicks
Joined: Oct 2010
Posts: 2,314
Likes: 4
From: Cape May, NJ; Guntersville, AL; Orange Beach, AL
Let me put it this way, the difference on the dyno of my car with and without cats was approximately 1 HP. And that was the most difference I saw.
I've got Borla headers, which are basically the same thing as LG headers since they used to manufacture all of the LG stuff.
I'd rather be environmentally responsible and run the cats given the absolutely negligible performance difference between running with or without them.
And honestly my car stunk to high hell without them, while I was waiting to get them welded up.
I've got Borla headers, which are basically the same thing as LG headers since they used to manufacture all of the LG stuff.
I'd rather be environmentally responsible and run the cats given the absolutely negligible performance difference between running with or without them.
And honestly my car stunk to high hell without them, while I was waiting to get them welded up.
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Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Don't run cats...your car will be more powerful.
Also, after your car is tuned up you will hardly smell anything at all. I've never had anyone complain about a smell (or even notice one) and have talked with my tuner on more than one occassion about the catless situation and how neither of us understand what everyone complains about.
Once the car is properly leaned out they seem to smell just fine.
Also, after your car is tuned up you will hardly smell anything at all. I've never had anyone complain about a smell (or even notice one) and have talked with my tuner on more than one occassion about the catless situation and how neither of us understand what everyone complains about.
Once the car is properly leaned out they seem to smell just fine.
Burning Brakes
Joined: Oct 2010
Posts: 763
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Racer
Joined: Aug 2008
Posts: 377
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From: Lyndhurst Ohio
Thread Starter
Melting Slicks
Joined: Oct 2010
Posts: 2,314
Likes: 4
From: Cape May, NJ; Guntersville, AL; Orange Beach, AL
Ok get caught for what??? Hello, I register my car in AL, no smog tests. Not to mention my fiance's dad was the old police cheif and mayor in the town we live in. I think I'm safe. Who the hell pissed on your steak tonight? It takes a real *&%& to go wishing tickets and fines on someone for doing something so trivial.
Last edited by gunterwalker; Feb 5, 2011 at 11:22 PM.
Burning Brakes
Joined: Jun 2005
Posts: 807
Likes: 1
From: Miami Lakes FL
I had kooks and borla stingers on mine. First, I was running no cats. Even after the tune, the gas smell was pretty bad and my exhaust tips were impossible to keep clean. I went ahead and switched out the x-pipe for the one with high-flow cats....no more smell, no more black tips and I couldn't notice any difference in power AT ALL.
Thread Starter
Melting Slicks
Joined: Oct 2010
Posts: 2,314
Likes: 4
From: Cape May, NJ; Guntersville, AL; Orange Beach, AL
I had kooks and borla stingers on mine. First, I was running no cats. Even after the tune, the gas smell was pretty bad and my exhaust tips were impossible to keep clean. I went ahead and switched out the x-pipe for the one with high-flow cats....no more smell, no more black tips and I couldn't notice any difference in power AT ALL.
Good Gals Drive It Hard
Joined: Mar 2008
Posts: 449
Likes: 17
From: Boca Raton FL
Let me put it this way, the difference on the dyno of my car with and without cats was approximately 1 HP. And that was the most difference I saw.
I've got Borla headers, which are basically the same thing as LG headers since they used to manufacture all of the LG stuff.
I've got Borla headers, which are basically the same thing as LG headers since they used to manufacture all of the LG stuff.
FWIW: Next week, I'm having my GS worked on. LG longtubes, x pipe, high-flow cats are among the items being done.
Race Director
Joined: Jun 2005
Posts: 10,909
Likes: 2,701
From: Phila Suburbs 2023 C8 & 2013 650ix
Ok get caught for what??? Hello
1. Not registering your car where you live.
2. Not giving your insurance company your correct address.
3. Removing your cats is a federal crime.
Trivial? Maybe for you, not for me.
It's the air I breathe you'd be polluting.
The less you pay in insurance the more I pay.
1. Not registering your car where you live.
2. Not giving your insurance company your correct address.
3. Removing your cats is a federal crime.
Trivial? Maybe for you, not for me.
It's the air I breathe you'd be polluting.
The less you pay in insurance the more I pay.
Instructor
Joined: Apr 2009
Posts: 104
Likes: 0
From: Arlington Texas
While I do not feel it is necessary to hope someone will get caught, keep in mind that no long tubes are legal cats or not.
My vote is for cats on a street car. I went without on my old white Cobra and got sick of the smell and the back of my car turning yellow.
My vote is for cats on a street car. I went without on my old white Cobra and got sick of the smell and the back of my car turning yellow.