The BYS wing looks decent at certain views but once you look at it from the rear it looks ridiculous!, i say go with the spoon duckbill, offers a clean look. End of the day your car, your style.
BYS wing looks ridiculously cool, but who the hell wants to add a non adjustable wing that acts like an air-brake 24/7 to their car?! I guess it helps you stop faster at speed, lol, with reduced fuel economy.
Bookmarks