Though each Boxster comes well equipped right out of the box, Porsche buyers want to give their new dream car a custom look or specification, so there is a long list of options available. Among the most popular add-ons are metallic paint ($825); a navigation system ($2,970); a Bose surround sound audio system ($1,665); a full leather interior ($2,095); and our Guards Red Boxster S test car was equipped with matching red seat belts ($340) that added a dashing, race-car touch.