As I understand it. The calipers are from a celica GT4 st185, and so are the pads. And the discs are from a BMW e30 318 (260mm and bolt patterns are 4x100mm, disk thickness 22/21mm, vented) Is this correct? The part number for the dics, is it for original discs or some other make? I am, maybe going to try this, it all depends on how much I can get the calipers for.