all i know,which is nothing,id be happy with 500 ponies but if a friend of mine or anyone else tried to come around me in a ford or chevy id get my credit card out. . after all is said and done lets see whos lasts longer,cummins and cat tried allum heads along time ago... . where are they now..... im a truck driver and all i can say is if it aint in line it wont be at the top of the hill with the others,v 8s feel good but they wont outlast a in6... ok im done ranting