I am running a gt-40 non-egr lower and a tubular gt-40 upper. I have done the mass air conversion, I use the egr block off plate and un-plugged the connector and the car runs great and I haven't had any check engine lights or anything on my dash. I might have a problem if emmisions testing comes back but right now it runs good.

Probably wouldn't hurt to run the one with egr because that way if anything happened down the road with inspections you would'nt have to change much...