Going off memory, I believe offset was 49mm front and 43mm rear for 8.5" an 11" respectively. If you want to run aggressive, I would say you could prob go wider (if this was a Turbo I would have) or drop to around 37mm offset for the back. Nonetheless, no rolled fenders, which I did not want to do on the 993, and no rubbing with 225 and 295's (996tt stagger setup).

Hey man, love the stance of your car. I have read some of your posts in the past trying to get info on your wheel offsets. I also have a C4S that is around RS ride height, and I am looking to get the most aggresive offset possible on my new wheels without having to modify my fenders at all. I am thinking I can move all four wheels 10 mm farther out, but not sure. Would you mind sharing your offsets with me? Did you have to roll your fenders?
Thanks, Charlie