Does anybody know what the option code is for limited slip diff on a 1999? Also, where are the option code plates on these cars ("mine" is 400 miles away, so I can't just look at that for a reference).
Thanks in advance

 

220....they're listed on a square sticker on the underside of the hood

 

If the label is missing, you can always order a CoA from Porsche to list/validate as built options:
http://www.pca.org/members/library/C...uthen_Form.pdf

 

And there's usually one in your owners manual as well.

 

Cool. I know "mine" (my parents') doesn't have it, but my friend is looking at getting an early 996 and one of them has it and an active brake differential (what is an active brake diff btw?) for sure, and the other probably doesn't but is in slightly cleaner shape. I'm hoping to find some options code love on the cleaner one that the seller doesn't list as having a limited slip diff.