Carbon fiber has ripples. Fitment isn't flush. Threads are weak. Mounting holes are off just enough that you can easily strip threads by threading sideways. Design is flawed. Even with a backing plate, wing is super unstable. No installation sheet. Can't drive past 130 without being scared it'll fall off. 1 of the brackets was crooked. And height of the wing itself wasn't what I needed. Honestly went to bed without dinner from disappointment. My gt350 pushing 800hp looks like a ricer now and they won't allow my review to be posted on their website.