I saw you asked this question in the classifieds in a wheel ad:
Do anyone if this setup will fit 2006 Cayman S? If so, i’m very interested and ready to make a move. My location is Waldorf, Maryland 20601.
I've got a set of these same wheels from a Cayman- bought them thinking they would fit my 996 but the rear offset is wrong for the 996. They are 9.5x19, ET 46 rear, 8x19, ET 57 front. Let me know if you're interested. Sorry for the cold call.
Charley