I have seen more failure in aftermarket ceramics then I have in factory steel bearings, I wont say which brands....and this is spanning back about 6 years and several thousand engines...I guess i am just not a believer in ceramic engine bearings, tho I will happily install them upon request.....I just don't really see the point of it....If a engine has junk bearings from factory then I will usually just not bother working with that engine....