Red,
In the kit I bought, I have the semi rigid felt channel that lines the top and rear of the main window. I have the straight metal/rubber seal for the vent window to close on, I have the flexible rubber piece that goes around the vent window and I have the piece in question, which is a rigid guide for the front of the main window, that is supposed to fit into the channel of the division bar. Alan's site doesn't mention anything about this.
