(They will fit the Skyline R34 but I have an issue with the sizing where there is a slight overlap on the left side of the plate viewed from the rear of the car.)
NOTE: Skyline R34: It seems the plate oversize look is only in the Showroom environment as screenshots do not seem to show the problem when on the track.
I NEED TO ADD AN ADDITIONAL 20 PLATES TO COVER THE MAZDA RX7 WHICH I WILL ADD TO THIS FILE AS A REVISION IN NEXT 24 HOURS.
Usual format, just copy and paste the Plate_D.dds and the Plate_NM.dds file of your chosen plate into the skin of your choice in the Skin folder of your car.