What is the flimsy panel covering the muffler area?

[Zoar Road]

So I'm changing to Winter Tires on my ST, and behind the rear wheel going forward is panel that is not solidly mounted and moves easily. I really didn't inspect it closely (it's cold in WI on the ground in January) but I've never seen a car with something like this. But I was truly impressed with the suspension system components front and rear. Nice job Ford.

 

[Autoworker]

I think that some vehicles has that panel, mine didn't.

 

[KegsBdry]

I think that some vehicles has that panel, mine didn't.

This panel is to cover really nothing. It might be to make it more aerodynamic, I suspect.

But there are some that didn't get that part (like me). The STs left the factory that way.