Mine came with them, I installed them a few times and used zip ties to keep them from blowing out or being easily stolen. However, I found the passenger side screen blocked my blind spot, sounds stupid in a convertible with the top down, but combined with them being too fragile and expensive I decided to quit using them, no difference in wind noise, just looks. Maybe I will build a pair like 78F350, I would be using zip ties anyway.
The center windscreen on the other hand makes a noticeable difference in cockpit turbulence and noise and is definitely worth having.
