This is a nice set of clean,  newest design PFC monoblock, angle bridge, internally plumbed, nickle plated race calipers w/ 4 piston differential bore 42mm / 40mm & ventilated titanium inserts. Pad shape PFC #7823. Caliper part# 49.323.410.440.01/02  These have larger pistons, are a stiffer design for much more stopping power and run cooler than the older design
(15 years +) ZR22 calipers. Mount  brackets included. As the pictures show, these are very low mileage.