I placed 1 seat cover on the X1/9 seat đş, it fit well. The seat cover are nylon spun plastic, the coloring is excellent. My problem is that the fabric although well made is not backed and blocked with 1/4" of foam. Car seats are often contoured, as such just stretching a fabric cover over them leaved the new seat cover billowy, it does not conform to the seat. At the car show where I tested it out with the judges...they said it cheapened the car as it was not an upholstered application. I think i will remove them and bring them to a seamstress to sew some blocking foam so the better conform to my seats. Now don't read this wrong, they are very nice and a value...just billowy as they are thin fabric covers.