After looking at
@b0n3z pictures of the rear calipers even more, I tried looking for brembo calipers that look similar.
It's interesting because from the outside view you can only see one piece. This is normally the case for fixed calipers with piston(s) in the inside and outside half, but it doesn't appear there is space for a piston in this case. That means it should be a sliding type caliper, but sliding type calipers typically have a fixed piece surrounding the sliding piece, similar to the AMG picture provided by
@Warren-RB . This isn't the case for the performance upgrade rear caliper, which again only has one piece visible from the outside.
Anyway, I googled brembo calipers and found the following new product that brembo announced in April of last year.
Latest Brembo calipers are a lesson in lightweight packaging
It appears that this could be the technology used for these rear calipers with just a change in aesthetics. What do you guys think?
Looking forward to
@b0n3z or someone with the performance upgrade brakes taking a wheel off and getting some pictures all around the calipers.