Explorer intakes

I just bought a bone stock 93 GT, (Air Silencer still in place) in really good shape. And like any good mustang owner, I know that it won't last very long being completely stock. I was looking around getting pricing for the old "intake, cam, heads" upgrade, and I heard about the explorer intakes. I did some of my own research and found that the lower intake was GT-40, and the upper was similar to a cobra as far as performance. My question is, is it true? And what, if any, mods do you have to do to get it under the hood? Any information I get would be useful as I plan to do the swap myself. Thnx