On my '32 Ford roadster I made a set of Lexan units, bent them in a brake then mounted them to the one piece windshield post. Later I added several snaps and had clear flexible snap on windows made. The whole system worked great, kept us somewhat warm on cold trips and very dry on rainy trips. The wings alone were smaller that the Speedway units but did divert some wind at speed. Only time there is a water problem is during a low speed turn in a parking lot. Rooster tails comes right in!