this disc is 320mm
-the caliper is the boxster 's'
the disc ic mercedes on a bay hub
-it dont fit in this style 16inch wheel

with a 20mm sapcer it might
-i have definately fitted a 16 inch front fuch on a 944 rear, -i think the stock calipers are fine, with the 20mm spacer removed -bay front studs fitted
, but i then fitted 90-91 2 pot 964 rearr calipers, and i needed a spacer of 7mm - i cut the stock 944 spacer down - remember to cut the spigot in the rear