what are the subframe dimensions of a newage impreza seat? i understand there to be two standards 405mm and 345mm for the spacing on the bolt holes on the bucket seat but are there similar dimension for secure bolts on the frame to the chassis of the car?

does this make sense?lol

was looking at buying unbranded seats with the bolt hole dimensions on 405mm but need to know what subframes i should purchase.

cheers in advance guys