If it's like my 987.1, you should be able to gently pull the trim piece off, starting where it meets up with the rear pillar trim (just behind the drivers head). It's held on with little metal clips that slide into the trim, and push into the frame. Here's a link from ******** that shows what the clips look like a few comments down. It's 991, but the clips look exactly the same.

A-Pillar trim in Alcantara? - ******** Discussion Forums

 

After doing this to wrap my pillars in alcantara, I lost a couple of the clips.

Anyone know where replacements can be sourced?

 

there are several different types of clips - use the parts file to identify the different part numbers first.

 

I think we both know the answer to that one.