John997s

I have been reading about what I need to do if I would like to run R-tires on my 997 S mk1 (2005). I will get the extended oil pan. But do I also need the Porsche Motorsport air/oil separator? What I have understood is that the caymans S need it but can't really see if I need it?

The product I am talking about is this:
http://forums.pelicanparts.com/boxster-cayman-forum/606549-motorsports-air-oil-separator.html

Thank you for any help!