[s-cars] anybody have any insight on putting Boxter calipers on anS6?

[Dave Forgie]

I have had the BIRA system 1 for four years.  The only issue is pad
squeal using OEM Porsche pads.  The solution for many (including me) was
Kerr Performance Friction carbon fibre-based pads from Paul Weston at
Weston Motorsports in Florida.  He is great to deal with.

IF I was to do it again, I would go for System 3 (Boxster S calipers,
somewhat larger rotors).  The main draw back of System 3 over System 1
is the number of 16" wheels that will work with System 3 is very small.
(Check the fitment section at the BIRA webpage).  IF money and wheel
size were no object, System 6 with the custom rotor hats and
cast-"Drilled" Porsche rotor rings is the way to go.

In either case, you need a BIRA or clone bracket to make the calipers
fit over the appropriate rotor.