On the new 50th anniversary mustang the side quarter windows are a glass louvered style. This glass is only available on the 50th and that's it. You currently can not get them any other way. Currently, I am working on a project that might change this. So my question to you all is simple. How many of you mustang enthusiasts would want to have these louvered style side windows on your 2015? A lot of positive feed back will help make these windows become available for anyone to buy. This is info I'm compiling for a market research project for the original manufacture of these anniversary windows.