FYI, you're going to have turbulent flow at the rear of the skirt where it curves in to meet the lower bumper cover. You can clearly see this in the tuft test vid I made of my car's rear skirt:
http://ecomodder.com/forum/showthrea...etro-3692.html
If you want to take it to the next level, "blend" the rear of the skirt into the lower bumper. It'll make a small, but real improvement.
Click to zoom...
A clearer view on a Camry Hybrid:
(from
http://ecomodder.com/forum/showthrea...-camry-84.html )