Longtubes = failed emissions test?
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Instructor
Joined: Feb 2003
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Longtubes = failed emissions test?
Ok, I'll admit that this question will probably sound a bit :crazy: to pretty much everyone on the board, but I could've sworn I've heard something a time or two about longtubes causing people to fail emissions. It had something to do with the exhaust being too cool when it passed through the cats, which therefore causes the cats to be less effective, causing a failed emissions test. Could there be any truth to this :confused:, (and if so, in what cases could they cause you to fail) or is my memory just a bit :crazy: ? The reason I am asking, is because I'm considering the LPE supercharger package, and I'm wanting to get their longtubes installed too. One thing though, I've heard of PLENTY of cases where people had no problems passing with LT's installed (on various cars), so now I'm really :skep: . :lolg:
☠☣☢ Semper Ebrius ☢☣☠
Joined: Jun 2001
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From: Virginia
Cruise-In IV-V-VI-VII Veteran
St. Jude's Donor '06
Re: Longtubes = failed emissions test? (Mr. Pepsi)
Ok, I'll admit that this question will probably sound a bit :crazy: to pretty much everyone on the board, but I could've sworn I've heard something a time or two about longtubes causing people to fail emissions. It had something to do with the exhaust being too cool when it passed through the cats.
Race Director
Joined: Dec 1999
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From: Houston Texas
St. Jude Donor '08
Re: Longtubes = failed emissions test? (Mr. Pepsi)
If the long tubes require the removal of the cats, then I would expect that you'd fail emmissions. I can't see the headers themselves causing a failure though.
[Modified by CorvetteSS, 2:18 PM 3/4/2003]
[Modified by CorvetteSS, 2:18 PM 3/4/2003]
Instructor
Joined: Oct 2000
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From: Redondo Beach CA
Re: Longtubes = failed emissions test? (Mr. Pepsi)
The only emissions test that I think you might fail is the "visual" portion. My car passed CA smog (IM240 roller test) with flying colors. As long as you take it to a cool shop and have cats you should be fine.
-Speed
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