how many ppl. who has had the S3 mani. with the proper install(support bracket)has had them cracked?-maybe a handful(I know of none). Any mani. can crack, I can't tell you the amount of DSMs(cause I'm an old DSMer)tubular mani. from good vendors have cracked in many places, you just have to pray and hope everything works right. One rule of thumb in this how much power can I produce world is IF YOU'RE NOT BREAKING STUFF, YOU'RE NOT GOING FAST ENOUGH-JOHN SHEPPARD(buy my transmissions-they are hard to break)----lol