I believe you need two of the trim pieces, They go up in the corners of the trunk divider panel under the catches. If you notice on the trunk divider panel there are two cutouts in the upper corners, these trim pieces cover that cutout on two sides, the bottom and the inner side. I have a fold down in my vert, best useless thing I ever put on the car...always get comments on it. Yes that is alot of cash for that little trim piece.Also I have latchs on both sides as the seat has little chrome plates that the catchs latch against on both sides of the seat.