You are wrong.
The nismo 350z stuff is an accessory designed for the 350z and the nismo 350z abroad is a variation of a 350z and still a 350z.
The gtr bumper is designed for a gtr and that's where it should stay.
You're trying the play the smartarse here and unfortunately just spouting shite. No matter what you want to spout, the 350z is not a gtr, a nismo 350z is a 350z. Nismo 350z accessories are designed for the 350z.
alot of the nismo stuff isn't actually made by nismo its re branded stuff from other manufacturers. when it comes to in house tuners like TRD nismo etc nsimo i think are one of the worst for actually doing anything themselves.