[Darren69]

It depends what calipers you have fitted. Fronts are usually M8 and afaik have always been over the various calipers fitted but rear ones could be M8 or M10. My '02 S4 has M8 front and M10 rear, which caught me out when ordering replacements. I got off my backside and made it to the garage but there was just too much junk to move in order to measure those on my 748 but I'm sure they are M8 same as front. It was just the S4 that was a weird mixture of both.