Where is Egr?

I could not find where egr in gasoline 307, I am thinking of canceling and trying with a seal, I wonder if there will be a noticeable result. Or is it worth trying?

I found someone who canceled the egr with the egr canceling machine through an acquaintance and I made a phone call he said he didn't give efficiency in the 307s. nice canceling maybe it is good in terms of performance but let's be sensitive to the environment please