a sheet of C/f?

 

Underbody splitter/airfoil?

 

Good guesses but think under the hood.

 

Since it's next to your pool, I'm guessing a C/F raft?

 

Now I see the outline under hood CF cover FTW!!

 

Doesn't look like it will fit nicely against the hood, and covering the bottom of the engine bay would be a bad idea. Doesn't look like it would work against the firewall either, and covering the radiator isn't a swift idea.

I'm stumped.

 

I bet it will fit like a glove
I new what is was as soon as I seen it But I've seen Jeff's car allot so I know it pretty well
some old pics

 

I thought they made "hoods" to cover the engine?

 

vented hood rain router?