This.

Which is why I suggested an APR GTC-200. They can be had for around $600, which is probably the most effective bang for the buck wing.

 

I purchased that wing. Installed it and it's a nice quality part. The cf does have some slight waves on it but hardly noticeable. The mounts are strong and I have put so,ex pressure on it and no issues. It barely moves in my rear window and seems more solid than some other wings I have pushed on

 

I have a gtc200 ..... if i shake the wing, it shakes my car.

Call evasive and they were willing to do $800 shipped on the gtc200 w/ 2.5" risers for me. They will give you better pricing over the phone than whats listed.

I have seen some decent ebay/knockoff wings but a majority that i have seen mimic the over all shape but lack an airfoil. The remain an inch thick start to finish where the gtc200 is fatter on the front edge and goes to a point in the rear as do the other big names

For 300 bucks or something i would give it a go, at that pricepoint i will go with tried and true apr