748L3-1EA0A = left diagram? brace assy rear (diagonal brace)
748L2-1EA0A = right diagram? brace assy rear (diagonal brace)
74840-1EA1A = rear pin stay assy (possibly the part you're asking about?)
G4840-1A30A = nismo rear pin stay assy (didn't know this part was different for a nismo)
Rep appreciated.