I have been concerned about cooling air flow to my gearbox due to the condition of those rubber air scoops on the front of the undertray. One of mine had fallen off, and the other was badly torn, and was no longer functioning as intended.
I did a search to see if you could purchase these somewhere, but found nothing available. I didn't try my local dealer though, as they almost never have anything I need.
So, I made my own:
If anyone wants to make some of these for themselves, here is the pattern. You can cut it out of .019" aluminum sheet from Home Depot, which is easy to bend over some wood, even if you don't have a sheet metal break.
Hopefully these will scoop some air without being so low that they hit anything.