The quarter windows are either Acrylic or Lexan....I am not sure which.....Originally, they were attached with foam tape.
On my modification- installed a GT clip on my 85 SE V6- The GT windows had broken at the front edge, so I made "B" pillars out of aluminum, painted them Graphite gray like the center of my wheels, and attached them with tabs and one screw, then covered the screw with a G6 Trunk Arrowhead emblem..... At the leading edge of the windows (Under those "B" pillars) I have a screw that Holds the glass from EVER flying off.....I glued the windows in place with black RTV.
I wish I knew how to post pics here..... Most people who see it think it is factory......
Oh and sometimes it's just amazing- That window flies off and doesn't get destroyed.....Of course, if it was ME picking it up off the road, shaking my head in disbelief......A semi would then hit me!
[This message has been edited by cvxjet (edited 09-16-2017).]