I ran a CTS today. I will not run any other body now. I found the CTS to have excellent downforce both in the front and in the rear. It is more neutral than a Mazda 6 or a Alfa 2.0 . It mounts very low. I had it touching the top of my front tower on my TC3. It looked low, sleek, and mean going down the backstraight at my track. BTW, Protoform is now offering a 200mm version of the CTS.