High flow Cats or 'Test Pipe'

[BLACK MOON]

I'm looking to eliminate my cats on my '03 LS1. Does anyone know who sells a 'Test Pipe' or high flow cats? I want to remove my stock set up and keep it for when i sell the car.

Thanks for the help.
Sal

 

[Tom Bryant]

I moved this thread to the C5 Terchnical forum. I think you will get better exposure for your question here.

Tom

 

[redvett]

Removing Cats is old school. The modern Cat is high flow and unless your racing off road in compettive events you never will feel the difference. The removal will require re calibrations to get it to run properly.
Its not a responsible move and illegal too.

 

[ScottNoxid]

I moved this thread to the C3 Terchnical forum. I think you will get better exposure for your question here.

Tom

I thought an 03 was a C-5???

 

[Tom Bryant]

Sorry for the typo. I mean C5. :L

 

[BLACK MOON]

I moved this thread to the C5 Terchnical forum. I think you will get better exposure for your question here.

Tom

Thanks Tom. I was looking at some topics in the C2 when i added the post.

 

[BLACK MOON]

Removing Cats is old school. The modern Cat is high flow and unless your racing off road in compettive events you never will feel the difference. The removal will require re calibrations to get it to run properly.
Its not a responsible move and illegal too.

You're quite wrong about the performance gains and the legality. But thanks anyway.

Does anyone have a source for test pipes or high flow cats that can be hollowed out?

Thanks again

 

[ScottNoxid]

Sorry for the typo. I mean C5. :L

Nice Vette, are you the owner? It looks like the Butternut Yellow, and is it a 60. That's when I really started liking Corvette's from 57 on up. Scott

 

[Chemdawg99]

You're quite wrong about the performance gains and the legality. But thanks anyway.

Does anyone have a source for test pipes or high flow cats that can be hollowed out?

Thanks again

Don't mean any harm here, but I think you are quite mistaken on the legality of installing test pipes. Here is the Tennessee Code on that:

68-201-120. Removal or rendering inoperative emission control devices from motor vehicles. —

It is unlawful for any person to remove or render inoperative any device or element of design installed on or in a motor vehicle or motor vehicle engine in compliance with regulations under the federal Clean Air Act, 42 U.S.C. § 7401 et seq., prior to its sale and delivery to the ultimate purchaser, or for any person knowingly to remove or render inoperative any such device or element of design after such sale and delivery to the ultimate purchaser.

[Acts 2004, ch. 926, § 6.]




Modern catalytic converters are not that big a restriction to exhaust flow and the PCM programming was designed for a certain amount of backpressure. The car would idle like crap without it. Additionally, reprogramming/reflashing your PCM is also a Federal violation (Clean Air
Act).

 

[BLACK MOON]

Don't mean any harm here, but I think you are quite mistaken on the legality of installing test pipes. Here is the Tennessee Code on that:

68-201-120. Removal or rendering inoperative emission control devices from motor vehicles. —

It is unlawful for any person to remove or render inoperative any device or element of design installed on or in a motor vehicle or motor vehicle engine in compliance with regulations under the federal Clean Air Act, 42 U.S.C. § 7401 et seq., prior to its sale and delivery to the ultimate purchaser, or for any person knowingly to remove or render inoperative any such device or element of design after such sale and delivery to the ultimate purchaser.

[Acts 2004, ch. 926, § 6.]




Modern catalytic converters are not that big a restriction to exhaust flow and the PCM programming was designed for a certain amount of backpressure. The car would idle like crap without it. Additionally, reprogramming/reflashing your PCM is also a Federal violation (Clean Air
Act).

Thanks man. I stand corrected.

As far as performance, 18 vettes and counting with cats removed (the ones that had them) and I've always had huge performance gains. This is number 19. The mechanic installing my pro-charger is great with writing pcm reflashes and I've seen and driven several of his customers cars. In this case I will keep the stock pipe for when I sell this car and will convert it back to stock. I promise.

Thanks again.
Sal

 

[Chemdawg99]

Thanks man. I stand corrected.

As far as performance, 18 vettes and counting with cats removed (the ones that had them) and I've always had huge performance gains. This is number 19. The mechanic installing my pro-charger is great with writing pcm reflashes and I've seen and driven several of his customers cars. In this case I will keep the stock pipe for when I sell this car and will convert it back to stock. I promise.

Thanks again.
Sal

Not a problem man. Its a law that VERY seldom gets enforced anyway depending on what state you live in or what testing station you go to.

 

[LLC5]

Not a problem man. Its a law that VERY seldom gets enforced anyway depending on what state you live in or what testing station you go to.

On top of that the fines are HUGE for the person or shop caught altering emissions for street driven vehicles, no matter what the state laws are. The fed's (EPA) don't tolerate it at all. If your going to do it, don't get caught.

 

[c5y2k]

You should be able to get a 'test pipe' from Auto Zone or O'Reilly's. At least the ones I go to have a shelf of them. If they dont I'm sure http://www.jegs.com will.

 

[redvett]

I myself prefer clean air to breath. Having lived & worked in a city with a lot of auto manufacturing i have seen the results of clean exhaust. The air is much cleaner & easier to breath.
Think about your actions, its going to effect you sooner or later health wise.

 

[Tom Bryant]

Nice Vette, are you the owner? It looks like the Butternut Yellow, and is it a 60. That's when I really started liking Corvette's from 57 on up. Scott

From what I've read modern cats don't have much effect on exhaust flow like the old pellet type did.

Yes it's my '59. Photo taken in 1969 and it was '68 Safari yellow. I stripped it off in 1971 and one of these days I'll get around to painting it again. It was originally triple black.

Tom

 

[Chemdawg99]

On top of that the fines are HUGE for the person or shop caught altering emissions for street driven vehicles, no matter what the state laws are. The fed's (EPA) don't tolerate it at all. If your going to do it, don't get caught.

You are 100% correct. Just because the law is seldom enforced doesn't suggest that it is right or WON'T get enforced. If you get caught or the shop gets caught it could cost you and shop big time......

 

[Chemdawg99]

Here is a very interesting link on the subject of defeating emissions control devices:

http://www.usdoj.gov/opa/pr/2007/July/07_enrd_490.html


I think it might be best to forget the "old school" techniques.

 

[redvett]

All someone has to do is hear your car and if he looks under and sees no converter write down your licence # and turn you in to the EPA.

 

[ScottNoxid]

All someone has to do is hear your car and if he looks under and sees no converter write down your licence # and turn you in to the EPA.

All you say is true, but how skinny does a guy have to be to crawl under a Corvette???L

 

[redvett]

All you have to do is stick your head below the rocker level and you will able view the converter area & if the hood is open look down.