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
2013 Audi S4 S-Tronic
2010 Audi R8 V10 Coupe 6MT
2011 Range Rover Sport Autobiography - - GONE!
2008 BMW M6 Coupe - - GONE!
2008 BMW M3 Cab - - GONE!