I have a question: are the bottom seat cushions interchangeable? Can the cushion from the passenger side go on the driver side? It looks like they are.
yeah pretty much the bottom pieces are but you can also buy new cushion from topflight or find some used in better condition the bottom pieces are exactly the same
You keep comparing 13mm and 1/2 inch as if they are the same. They are not. The 13mm is slightly larger than the 1/2 inch. 13mm when converted is 0.530.
