This K&N air filter is perfect for Porsche Boxster and Cayman owners who want to boost their car's performance. Whether you're driving around town or hitting the track, this filter will help your engine breathe better. It's designed to fit specific models from 2004 to 2012. The filter uses a layered, oiled cotton media, but we don't need to get too technical. Just know it works great! And it's easy to install right into your factory air box. It's a great choice for anyone who wants to get more power out of their Porsche and save money in the long run by reusing the filter.