Niiiice!
Please tell me you're thinking about doing some ABA on that.
After reading Houston Bill's air dam/coastdown writeup, I was theorizing that our cars' aerodynamics had less to gain from the same mod, based on the smaller than expected 2.x% FE gain (@ about 85 km/h) seen in my full belly pan trial (which was only A-B, admittedly).
Maybe my theory is bunk, and/or my understanding of the trade-offs between a smooth bottom vs. honking air dam is flawed.
As for my DWL/EOC #'s, remember: no alternator, taller F.D. & XFi cam.