I was a leery of ordering this online but I measured everything out and went for it. Thankfully Amazon Prime gave me free shipping.
So here is what is like on my 2005 4x4 LE:




As you can see, there is not much room. Hard to tell from the picture but at the smallest point I have about ¼ inch of room.

I now get better gas milage, less wind noise, my boards latches don't frozen anymore, and i'm not afraid of them flying away. Biggest downside was the freaking price.