I have been working on a design to adapt the C6 Z06 6 piston brake calipers to the 944. I have a design for the 944 and the 951. I'm going to have them waterjet cut. If anyone is interested in them, let me know. Price will be $100 a pair for the brackets and bolts needed. The early 944s will need some 1/4" spacers that will be another $10.
These are designed to run on the 350mm Cayenne rotors.
These will also work on the early 928. I do not have a design for the late 928 yet.