Porsche 2 22x10 front and 22x11 rear rims are the largest you can do without doing any other changes and not rubbing. You will want a 285/35-22 tire on the rims front and back. Anything larger and you will have issues unless you do some other serious mods. I think I'd do the 22x10 at all four piwis tester 2 corners so I could rotate them. Should fill that Porsche out pretty nicely, though.