To fit this to our cars, we need the LN Billet Spin on adapter:
Spin-on Oil Filter Adapter for MY97-08 Boxster/Cayman/911 LN Engineering
I have this already and run the Wix 51042 oil filter. Folks that run an accusump using the sandwich adapter and the Wix 51042 filter are sometimes concerned because the filter hangs down a little below the oil pan cover. The shorter filter in the first listing helps resolve that issue.