middle two are too curved to be the JR one. On the JR they go out much straighter.
And the left one tucks inside of the right one and its the other way rounf don the JR.
Not saying its not, as obviosuly designs can change and modify, but there are so many after market manifolds out there it seems less likely.
Also if either is from Japan, its even less likely as the JDM market has loads of quality options i dont think they would have imported a American one.
just my 2p guess