Patrick's says the drop is 4", but I think it was more like 3". If you look at the picture, you'll see that the bottom edge of the fender lines up with the top edge of the tire. That was exactly the look that I was looking for. The stock setup is about 2-3" above the tire.
I like the ride, but then I wanted a ride that was a bit stiff. It doesn't ride like a passenger car, more like a sports car suspension.