Seat is 4 or 5 inches taller. Rails are 19 inch wide, 300zx is just 14. Distance from tunnel to rocker panel along floor in a Z32 is barely 19 inches. Seat cushion width is the same but back wider and taller. These seats can be fitted to a Z32 but extensive work to fit the GTR seat to the 300zx floor rails must be undertaken. GTR seat has ugly large plastic along door side and the tall back may be overwhelming visually.