The part numbers for the uprights used for Option code I450 PCCB on 2010 Cayman from the PET are 997 341 157 25 for left and 997 3412 158 25 for right. A cheaper approach might be to talk to Duane at Vision Motor Sports, a P-9 sponsor. They have adapter bolts that allow the stock Cayman uprights to be used with 2004 GT3 6 pot calipers ( non-pccb ). These adapter bolts are part of the Vision Motor Sports BBK ( 2 350mm AP rotors/hats, 2 2004 GT3 calipers, adapter bolts )
Thanks for the response Rob! Do you know if the PCCB calipers offered via option code 450 on 987.2 cars are the same as the original 996 GT3 PCCB calipers? I thought I read somewhere that the Cayman PCCB uprights aren't compatible with the original GT3 PCCB calipers only with the gen 2 calipers. The Vision BBK kit if more $ the I want to spend. I'm looking at a used set.