Hi, My Z432 has an genuine option rear spoiler.But it is not periodically correct one. The one is for 1971 or later. Last month I have got a genuine earliest spoiler from Mr.Terashima. He is a hard core enthusiast , he has 2 Z432s and 1 Z432R. The earliest spoiler is a very,very rare to see.We sometimes see the ones but they are usually reproduction one.It is easy to distinguish, repro one does not have correct stud bolts nor brackets.Also we can see it from the outside, the 2 vertical rib