Posted By Mario Linguini on 30 Mar 2015 06:02 PM
"Wheel spacers are permitted provided the resultant combination complies with the offset requirements of this Section. On vehicles supplied with an OE wheel spacer, the wheel spacer shall be considered as a part of the wheel."
I would say yes. Just make sure that the Wheel Spacer Option changed absolutely nothing else that cannot be changed legally. For example, if the Wheel Spacer Option also included a quicker steering ratio (which you cannot legally change) - then no.
Thanks for the note and, at least on the Cayman R, selecting the wheel spacer option changed absolutely nothing else.