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AIR/EGR delete

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Old Jan 12, 2017 | 08:10 PM
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Default AIR/EGR delete

My brother has a 1999 LS1 corvette. It is in the process of having long tubes put on. The shop said the EGR tube needs to be extended and the X pipe he has will not mate up to his Corsa catback.

Could the EGR/air just be blocked off with some block off plates?

Does anyone know if Stainkess Works x pipe will mate up to a Corsa Catback?
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Old Jan 12, 2017 | 08:27 PM
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we don't have a EGR ???
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Old Jan 12, 2017 | 08:28 PM
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if your talking air infection system for the Cats. yes I took all mine off and used block off plates on the headers and had the tuner tune out that system.
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Old Jan 12, 2017 | 08:55 PM
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Originally Posted by Pounder
if your talking air infection system for the Cats. yes I took all mine off and used block off plates on the headers and had the tuner tune out that system.
That must be the AIR system I'm talking about. Where can you get block off plates for the headers and pump?
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Old Jan 12, 2017 | 08:56 PM
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If it's a full X back to the muffler connection; they should fit. None of the cat back manufacturers change the connection point AFAIK.

You can use block off plates if allowed where you live, but you should disable the system, and you will have to have it tuned out so you don't get dash warnings.
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Old Jan 12, 2017 | 09:00 PM
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Originally Posted by billy mild
That must be the AIR system I'm talking about. Where can you get block off plates for the headers and pump?
e-bay amazon
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Old Jan 12, 2017 | 10:55 PM
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Some pictures be nice to look at.
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Old Jan 12, 2017 | 11:03 PM
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Originally Posted by Nurburgring
Some pictures be nice to look at.
Pics of AIR system, block off plates...? Edit; following further into this thread, assuming pic of headers.

Last edited by grantv; Jan 13, 2017 at 11:25 PM.
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Old Jan 13, 2017 | 07:40 PM
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The shop doing the work said the X Pipe is 3 inch and the axle back is 2.5 inch at the flange so it would not bolt up. X Pipe and headers are SW, the axleback in Corsa.

On the AIR injection system what is the best place for block off plates?
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Old Jan 13, 2017 | 07:53 PM
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I'm not finding a AIR supply block off plate for the headers. Thoughts?
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Old Jan 13, 2017 | 07:54 PM
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Originally Posted by billy mild
The shop doing the work said the X Pipe is 3 inch and the axle back is 2.5 inch at the flange so it would not bolt up. X Pipe and headers are SW, the axleback in Corsa.

On the AIR injection system what is the best place for block off plates?
the block off plates go on the headers if they have the air injection ports, not all have them. My XS Power x-pipe is 3 inch but the flange to the Cat back is 2 1/2 ??? and most X-pipes are ????
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Old Jan 13, 2017 | 07:56 PM
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Amazon and e-bay have tons of them for LS 1's ???
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Old Jan 13, 2017 | 08:57 PM
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"AIR supply block off plates"
From what I have read if they are Not connected they vibrate and will crack your headers
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Old Jan 13, 2017 | 09:01 PM
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Originally Posted by Smoken1
"AIR supply block off plates"
From what I have read if they are Not connected they vibrate and will crack your headers
three summers and 20,000 miles, mine aren't ???
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Old Jan 13, 2017 | 09:26 PM
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Got me on that one...Best of luck thou
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Old Jan 13, 2017 | 09:52 PM
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Originally Posted by Smoken1
Got me on that one...Best of luck thou
not discounting your input, just my observation on my car. seems like half of headers installations would not hook up the air system ????
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Old Jan 13, 2017 | 10:12 PM
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Depends if you get the right set for you year of car from what I have read...
In my case I went with the Hinson headers. I have no smog laws over here
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Old Jan 13, 2017 | 10:32 PM
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http://www.ebay.com/itm/LS1-AIR-BLOC...xVCCtA&vxp=mtr

So that piece would go on the header ports?

http://www.ebay.com/itm/like/381622211887?lpid=82&chn=ps&ul_noapp=true
This is used on the intake manifold?
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Old Jan 13, 2017 | 10:56 PM
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Originally Posted by Smoken1
Depends if you get the right set for you year of car from what I have read...
In my case I went with the Hinson headers. I have no smog laws over here
I have been wanting to remove my headers and cut off the tube and have it welded up then have my headers coated, just have not found the time.
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Old Jan 13, 2017 | 10:57 PM
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Originally Posted by billy mild
http://www.ebay.com/itm/LS1-AIR-BLOC...xVCCtA&vxp=mtr

So that piece would go on the header ports?

http://www.ebay.com/itm/like/3816222...&ul_noapp=true

This is used on the intake manifold?
you don't need that, it is for the EGR, the plates you need are the ones I showed you post #11
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