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Do Long Tube Headers make your car not emissions legal?

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Old 03-17-2007, 10:48 PM   #1
Redleg
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Default Do Long Tube Headers make your car not emissions legal?

I know that changing some things on your exhaust (taking cats of X/H pipe) violate emissions. Do Long Tube Headers do the same thing? I was browsing, JBA's site and they say their LTHs are off road use only. Can anybody explain the science behind this one?
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Old 03-17-2007, 10:52 PM   #2
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Default RE: Do Long Tube Headers make your car not emissions legal?

I don't see why they would change your emissions unless you removed the cats? The high-flow cats might increase your emissions. I'm no expert on the subject though.
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Old 03-17-2007, 11:54 PM   #3
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Default RE: Do Long Tube Headers make your car not emissions legal?

I believe there are no Longtube Headers for the 05+ GT that are CARB legal. This means that if they aren't CARB approved you may not pass emmisions depending on how strict the state or county you reside in is. However you may be able to pass emmissions in stirct states with a catted setup as you have a good chance of passing the sniffer test and some states just do a visual for cats. This is why though JBA and other header companies say offroad use only because without a CARB approval they have no way of saying they will pass for sure.

From our experience we have lots of customer though in California which is a very strict state that run Longtube headers not only on their S197's but also Cobras and GT and I haven't heard from any of them having a hard time passing emmisions. Again. It really comes down to how strict of an area you live in and who's doing the inspection. Hope that helps. Jared

Quote:
ORIGINAL: Redleg

I know that changing some things on your exhaust (taking cats of X/H pipe) violate emissions. Do Long Tube Headers do the same thing? I was browsing, JBA's site and they say their LTHs are off road use only. Can anybody explain the science behind this one?
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Old 03-18-2007, 01:04 AM   #4
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Default RE: Do Long Tube Headers make your car not emissions legal?

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ORIGINAL: Boostaddict

From our experience we have lots of customer though in California which is a very strict state that run Longtube headers not only on their S197's but also Cobras and GT and I haven't heard from any of them having a hard time passing emmisions.
That's because California doesn't have to have a state inspection for 7 years from the time of purchase.

As for the original question. Technically installing LTs will indeed violate emissions laws. Any modification to the exhaust system ( including relocating the position of the cats ) will violate the law.
But that does not mean that your car will not pass a sniffer test.

In Texas for newer cars they do an OBD II scan for inspections. For whatever reason the place I went to could not get their scanner to communicate with my PCM so they did a sniffer test instead. And here the sniffer test doesn't just involve putting a probe in the tail pipe and letting the car idle. They actually put it on a set of rollers and take several samples at pre determined RPM and speeds. I am running Kooks LTs and high flow cats and my car passed the sniffer.
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Old 03-18-2007, 01:22 AM   #5
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Default RE: Do Long Tube Headers make your car not emissions legal?

yeah right now I am trying to decide between the kooks, dynatechs, and stainless works complete systems. I have talked to the folks at all their offices and they say if I get the x-pipes with cats that I will be ok with emissions(all the systems come with o2 sensor wiring). So I don't think long tubes matter.
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Old 03-18-2007, 01:25 AM   #6
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Default RE: Do Long Tube Headers make your car not emissions legal?

we are good in Maryland... camaro's and trans ams with full exhaust systems pass emissions by leaving the cats on... i would say that you will be fine if you purchase longtube headers (if thats the intent of asking this question)...
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Old 03-18-2007, 08:25 PM   #7
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Default RE: Do Long Tube Headers make your car not emissions legal?

Thanks all for the replies. So it sounds like in a nutshell:

1) Theoretically, modifying exhaust will violate emissions
2) It all depends on how strict the state is.
3) Possibly, so long as I have my cats I should still be good (if my state just does the visual inspection for them)

I'm a Illinois resident and I think the inspection is just a visual cat. Thanks Lethal Performance for the response. I'm on the fence between the Mac Prochamber Catted H Pipe with Long Tube Headers or the JBA catted H pipe with Long Tube Headers. I've just heard from some sources that the Prochamber catted H Pipe is out of production until Mac finds a new manufacturer for their high flow cat.

We'll see.
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Old 03-18-2007, 08:31 PM   #8
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Default RE: Do Long Tube Headers make your car not emissions legal?

Wow, this is the fifth thread about this in the last week or so?

Anyway:

In the USA, NO longtubes are street legal. They all violate the Clean Air Act (a FEDERAL law), becasue they move or replace the OEM cats. The law reads that you cannot replace or move the stock cats, period.

Section 203 of the US Clean Air Act, 42 US Code, Section 7522

Anyway, practially speaking, that law isn't particularly relevant. What matters most is your individual locale's inspection policy. Some places are stricter than others. But so long as you have cats you can pass a sniffer test.
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Old 03-19-2007, 04:10 PM   #9
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Default RE: Do Long Tube Headers make your car not emissions legal?

go to the shadiest place you can findand offer the guy doing the inspection 50 bucks.ive had to do this a number of times with other carsit should be fine
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Old 03-19-2007, 06:59 PM   #10
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Default RE: Do Long Tube Headers make your car not emissions legal?

this is kinda off topic but from what boostaaddict said.. is it true that if you don't get any aftermarket installations "approved" by the CARB then if they find out, they can impound your car?
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Old 03-19-2007, 07:28 PM   #11
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Default RE: Do Long Tube Headers make your car not emissions legal?

Quote:
ORIGINAL: CrazyAl

Wow, this is the fifth thread about this in the last week or so?

Anyway:

In the USA, NO longtubes are street legal. They all violate the Clean Air Act (a FEDERAL law), becasue they move or replace the OEM cats. The law reads that you cannot replace or move the stock cats, period.

Section 203 of the US Clean Air Act, 42 US Code, Section 7522

Anyway, practially speaking, that law isn't particularly relevant. What matters most is your individual locale's inspection policy. Some places are stricter than others. But so long as you have cats you can pass a sniffer test.

Didn't I say that?
Quote:
ORIGINAL: hawgman

As for the original question. Technically installing LTs will indeed violate emissions laws. Any modification to the exhaust system ( including relocating the position of the cats ) will violate the law.
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Old 03-19-2007, 09:44 PM   #12
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Default RE: Do Long Tube Headers make your car not emissions legal?

Yeah, you definatley got it right Hawg, I just wanted to make it 100% clear. This topic comes up all the time despite people like you posting the correct answers.

The big problem is that people differentiate between local laws and the federal ones.

For example, my county has no smog test of any kind. So my LTs don't violate local or state laws. But the Fedaral one is a different story.
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Old 03-20-2007, 03:56 AM   #13
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Default RE: Do Long Tube Headers make your car not emissions legal?

Quote:
ORIGINAL: Iwasaricer

this is kinda off topic but from what boostaaddict said.. is it true that if you don't get any aftermarket installations "approved" by the CARB then if they find out, they can impound your car?
lol im curious
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Old 03-20-2007, 04:03 AM   #14
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Default RE: Do Long Tube Headers make your car not emissions legal?

Quote:
ORIGINAL: hawgman



That's because California doesn't have to have a state inspection for 7 years from the time of purchase.
Really? Can anyone second this?
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Old 03-21-2007, 04:02 AM   #15
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Default RE: Do Long Tube Headers make your car not emissions legal?

I could have sworn it was only 4 years after a new car purchase that it is smog test exempt......tests begin at year 5.
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Old 03-21-2007, 08:11 AM   #16
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Default RE: Do Long Tube Headers make your car not emissions legal?

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ORIGINAL: cdmsaleen

I could have sworn it was only 4 years after a new car purchase that it is smog test exempt......tests begin at year 5.
DonW and plenty others from that coast have all said that they wouldn't need inspection until 2011 ( and that is with early purchase 05s )
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Old 03-21-2007, 08:12 AM   #17
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Default RE: Do Long Tube Headers make your car not emissions legal?

Quote:
ORIGINAL: CrazyAl

Yeah, you definatley got it right Hawg, I just wanted to make it 100% clear. This topic comes up all the time despite people like you posting the correct answers.

The big problem is that people differentiate between local laws and the federal ones.

For example, my county has no smog test of any kind. So my LTs don't violate local or state laws. But the Fedaral one is a different story.
I was just givin' ya a hard time Al. You are 1000% correct though. There could be 10 correct answers in a row and someone would still bottom post the incorrect one, or ask the question over.
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Old 04-13-2007, 05:08 PM   #18
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Default RE: Do Long Tube Headers make your car not emissions legal?

LT in Cali are definatly a big no no, and if the inspection is done as required the tech is required to look at the cats to verify that they are there and had not been modified. The replacement of non OEM (read high flows) cats on any vehicle with less then 80k miles and under 8 years old is a violation of federal law, and this will cause a fail of the visual inspection part of the California Bi-Annual inspection.

By relocating the cats down streem to get the LT on it causes the cold start to go out of specs, the cats take way too long to get hot which will get you a sniffer fail if the car is cold when tested.
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Old 04-13-2007, 06:02 PM   #19
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Default RE: Do Long Tube Headers make your car not emissions legal?

for ten extra horsepower it sure is expensive but it isn't my car so I will shut the **** up.
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Old 04-13-2007, 09:13 PM   #20
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Default RE: Do Long Tube Headers make your car not emissions legal?

Quote:
ORIGINAL: hawgman

Quote:
ORIGINAL: cdmsaleen

I could have sworn it was only 4 years after a new car purchase that it is smog test exempt......tests begin at year 5.
DonW and plenty others from that coast have all said that they wouldn't need inspection until 2011 ( and that is with early purchase 05s )
Don't know what he's smoking, it's 4 year exemption and a smog test on the fifth, then bi-annually thereafter(both visual and sniffer) on new vehicles. When I bought a new truck in 1999, I didn't have to get a certificate until theyear 2004.
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Old 04-13-2007, 09:13 PM
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