I was thinking the same thing
check out my current M6's calipers...
BUT I think the new M5 caliper "///M" sticker is too small for the size of the caliper... just my opinion
2010 Audi R8 V10 Coupe 6MT-White on Red
2016 Range Rover HSE TD6-White on Ivory
Incoming (sometime this month)
2016 BMW X5d - Black Sapphire on Terra