The Holden part numbers are listed by Ron on his
summary post I linked in my earlier post.
May be I’m misremembering which thread the CTS V brake part numbers were part numbers are listed in
this thread and
this thread or you can search google for more threads on CTS V part numbers (there are plenty).
google “site: forums.just ommodores.com.au CTS V brake part number”
PS: just keep in mind that Ron‘s engineer required the 27mm bore brake master cylinder for his 4 pot Brembo upgrade but his SS already had this due to the police brake package option it came with. Your engineer may or may not require such (as each state has its own perverse interpretation of national rules)