The original query was in relation to a custom remap Amit. In stock setups - yes we have to do with the EGR mumbo jumbo and all the justifications that the manufacturers and the green guys provide. But while doing a custom remap, the only justification for the EGR can be either : a. It is virtually impossible to delete EGR. b. The guy doing the remap is unaware how to completely delete the EGR.