Ok, I think I will give it a last shot with the EGR mod removed. Due to the fact that I was using a SVT UIM from a 98 model (single honed) and have now replaced it with a standard UIM which has been max honed (and retains the stock primary ports, however, the secondary ports have been opened to nearly 34mm) should I even expect this modded UIM to outperform the 98 SVT UIM?
Are the plenums actually enlarged during the EH process, or merely smoothened out? If they are not enlarged, then would a factory SVT UIM still outperform a modded standard UIM cause the internal diameters of the runners are larger on the SVT one?
Sorry if this is getting confusing, I am trying to figure out what I should be expecting!
I would just also like to add, that I contacted Rick Miller from EH about this, and he seems quite helpful in his responses. Its nice to deal with people who care!
