Pretty sure the 3 door and the 5 door GSR's have the same bumper but the 4 sedan standard cb is different.
Not too sure about half being metal though the front bar on my cb gsr is all plastic.
Yer but isnt that first picture a standard 3 door, im mean GSR to GSR,will a 3 door GSR bumper fit to a 5 door GSR, but from looking at the first picture anyways, it does seem it will be shorter, im only after the clips that join the reo to the bumper because i seen this bumper at my old wrecking yard i worked at, its a 3 door GSR bumper and its kinda got plastic over-rider effect like on old ford and holdens steel bumpers, looks kool to me anyways and it seems like a genuine bumper, didnt look at it much tho but its got the clips for sure, its gonna take 10 weeks for the japs to send me some otherwise lol