*Do not try this at home*
I have driven from PHX to San Diego many many times in the last 4 years. There is a stretch on 8 that is very desolate. I actually had my SVT at 140+MPH for over 30 minutes staight. While it sounds scary, it is actually very stable. After 120MPH or so, there is a strange quietness in the cabin. The only thing that you hear is the whoosh of the air and the pounding of your own heart... Pretty cool. Anyway, there is no telling when aerodynamics will fail you. I doubt 140MPH would cause the loss of control I spoke of earlier, but I am not an expert.
About the Mirko splitter... I am sure that it helps with downforce to some extent, but it is attached to a body-kit that is held on by plastic push-rivits. I doubt very highly that it serves the same purpose that a splitter on a true race car serves. It is more aesthetic that anything.. Again, I am no expert.
