Does 200, I am not sure what I will do for finish. Might just paint it flat black so it disappears. I need to work on the bends some but having it done while the car was upside down was invaluable. If I had to make it with the car on it's wheels it wasn't going to happen.

Aerodynamics? No one knows for sure. That's what testing is for. My car has a number of things different. For one all air going through the air dam and front of the car exits the hood. All air underneath is blocked off. That alone will change a few things. Smoothing the air may actually help prevent lift in that dirty air turning under the car will back up creating more pressure. Smoother air will have a chance to evacuate.

As far as diffusers and such, one step at a time.

Will it help, hurt? I am certainly making no claims. We'll see how it does.

Comp 2, I added a couple more underbelly photos on my Group 4 below showing cooling lines. From your photos it looks like yours may be going up under the pan? If so, how would you get to them?

http://www.poca.com/index.php/...ery/?g2_itemId=10206

Excellent photos thank you. That is one clean looking underbelly!

My pan is removable. It is held on by 34bolts and goes all the way to the front of the car.

Comp-2, when you start testing, be sure to include brake rotor temperatures. One midwest track-Pantera owner that blocked off most underbody airflow with a deep airdam found that the rotors then got no cooling air and he ate pads 3X as fast as before.
There's no free lunch with Mother Nature'