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egr/air system block off plates?

This is a discussion on egr/air system block off plates? within the General Help forums, part of the LSx Technical Help Section category; I have been seeing these all over ebay and was curious about what they do? why would you block off ...

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    egr/air system block off plates?

    I have been seeing these all over ebay and was curious about what they do? why would you block off the egr and is it illegal?

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    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by jmatt07 View Post
    I have been seeing these all over ebay and was curious about what they do? why would you block off the egr and is it illegal?
    it depends on your state/county laws... i did it... the egr recycles exhaust fumes back in to the intake to "lower emmisions"... the reason most people block them off is because they get a new intake manifold that doesn't have EGR provisions...

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    Veteran 0rion's Avatar
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    like spaz said, unless you get an ls6 intake I wouldn't worry to much about it. People claim gains although I'd say it would be very very minimal. The air system does shed a few pounds. I did both but having been there and done it I'm not sure I'd do it for any other reason than to clean up the engine bay.

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