GT500 SVT spoiler with the gurney flap. CJPonyparts sells them, get painted and directly drop shipped from 3DCarbon, specify that you want to keep the flap flat black. Paint quality and match are extremely close. Very difficult to do with metallic paint.
Are you suggesting that there is such a thing as false downforce? Please define your parameters that quantify "real". By my definition, any number that is positive over zero quantifies "real" for me. I also do not have any pressure measuring plates that can be mounted under the spoiler and feed info to a computer in real time to display exerted force. I also do not own a wind tunnel. How do you suggest I test this? You can ask Ford, it's an exact copy of their spoiler to spec, and I'm sure they did wind tunnel testing with much more advanced equipment than I own. My ass certainly felt more planted on the road curves and bumps at 135mph this time around than when I first got my car. I feel that the force exerted on the rear of my vehicle far exceeds that of the weight of the spoiler, there by suggesting that it does push the car down. The spoiler weighs less than 4 pounds. That in itself will not hold the car. Isn't the point of aerodynamic downforce to weigh the car down without actually adding unneccesary weight which would hinder performance?
Is the rear valence on yours different from the other one? Really liking that spoiler. I was also looking at the roush chin spoiler, but not sold on it yet.