long tube header and emissions
Thread Starter
Pro
Joined: Nov 2002
Posts: 621
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10
long tube header and emissions
I want to install LG long tubes with high flow cats and do a performance tune on an otherwise stock LS1 coupe, but I am worried about emissions testing. Here in Memphis we have a sniffer. Has anyone done this before, or have any experience or guidance ?
Thanks ! :confused:
Thanks ! :confused:
Racer
Joined: Feb 2002
Posts: 479
Likes: 1
From: Portland OR
Re: long tube header and emissions (Spiral Bri)
Brian,
Here in Oregon, '96 and newer cars get the OBDII test. My 2001 LS1 with FLP's and hiflow cats passed in March with no problem. I was worried that they might do a visual inspection and fail me for modified emissions equipment. But they never even popped the hood or looked underneath. I have kept my stock exhaust out of fear that I would have to reinstall to pass emissions.
TN doesn't use OBDII? You should have no problem passing the sniffer test as long as you have the cats installed. A number of forum posts have reported no problems passing. The visual inspection may be another matter.
Alan :seeya
Here in Oregon, '96 and newer cars get the OBDII test. My 2001 LS1 with FLP's and hiflow cats passed in March with no problem. I was worried that they might do a visual inspection and fail me for modified emissions equipment. But they never even popped the hood or looked underneath. I have kept my stock exhaust out of fear that I would have to reinstall to pass emissions.
TN doesn't use OBDII? You should have no problem passing the sniffer test as long as you have the cats installed. A number of forum posts have reported no problems passing. The visual inspection may be another matter.
Alan :seeya
Pro
Joined: Sep 1999
Posts: 545
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From: San Jose, Ca./Kona, Hawaii
Re: long tube header and emissions (Spiral Bri)
Installing headers won't change your emissions numbers. You will pass the sniffer. If they do a visual inspection under the hood, they might fail you if they notice the headers. Just make sure whomever does your performance tune, they know you need to be able to pass smog.
Burning Brakes
Joined: Feb 2000
Posts: 1,247
Likes: 0
From: Denver CO
Re: long tube header and emissions (davette)
Recently did my emissions check in CA; not only did he not notice the long tubes, he apparently didn't notice the supercharger. She passed with flying colors, runs cleaner than stock. :D
Le Mans Master
Joined: May 2000
Posts: 5,377
Likes: 14
From: Kansas City MO
Re: long tube header and emissions (Spiral Bri)
emissions??? i drive 120 mph every day with long tubes, no cats, and a tankful of 110 low lead. hopefully i'll kill the rain forest by 2005. ;)
