they do wear out and they do have a limit of around 400hp i believe --correct me if im wrong-- ceramic clutches will wear out the flywheel before the cluch wears out and there is practically no reachable limit to them in a focus anyway. just depends how strong that clutch leg is because the more beef the clutch has the harder its gonna be to push. its worth it tho if you have or soon will have the HP to justify having it. just get a good stage 2 or 3 clutch from massive speed. pick out one you like. if you have turbo nitrous or supercharger get a 6 or 4 puck clutch. those are my personal preferrance. 6 puck is a little easier to drive on the street than some of the 4 pucks ive driven.