EGR, is it necessary?

i agree with dave. its crap that you dont want if it is on a carbureted induction setup, but if you are using the stock setup EFI or an aftermarket EFI, you may want to utilize it(if the aftermarket setup doesnt recommend it, then thats different). the cpu relies on information from the egr if it is of the new variety and removing it wont improve performance very much, if any.