The front would need a 13mm spacer, the back will fit fine, you will actually have 9mm more room to the inside on the back wheels. 245 tire on a 8" rim is the max recommended, but for the 9" rear 265 is the max recommended size tire.
I got may spacers from here.
2003 Porsche Boxster Roadster S H6 3.2L - ECS Tuning