Don,
We have seen several cars get hit from behind because the car following them couldn't see the driver in front waving his hand back and forth to signal he was going into the pits. At least this spoiler will give them a little better vision. I am looking forward to next weekends race, but more so to the first 1 1/2 mile track to see just how much the spoiler may affect the speeds on the straightways. I don't think it will slow the cars down to much and I would rather see good racing at a little lower speeds than a 195 MPH circle of cars just driving around because no one can pass.
Ron