So Sean what are you saying now? You're on board with the 330s having the same 13.7 steering rack ratio but now suggest the internals and something else in the 330-zhp rack makes it better.
So when you need a replacement 330-zhp steering rack bmw doesn't make them anymore or you suggest they are all the same now? I really don't follow.
I can't say about the internals but do you really think BMW made a special rack run? Also without a replacement for the car? There are part numbers for everything else and with a cost.
I leave you with the term, "Occam's razor". It fits this best of any.
OE CSL WHEELS - OE CSL BRAKES - OE AUTOFLD MIRRORS - CSL RACK - CSL TRUNK - CSL DIFFUSER - AA TUNE - AA PULLEYS - AS 40% SSK - BILSTEIN PSS9s
CF CSL LIP - NAV- BMWP CF STRUT BAR - BMW GROUP N MNTS - GRUPPE M CF INTAKE - SUPERSPRINT - UUC S/S LINES, RTABs - H&R SWAYS - 4.10 M-SPORT DIFF