I ask about cores as I noticed comp was using cast cores with the -9 tag,yes, 4 different comp suppliers confirmed this. For that build I really wanted a 2pc core,which after working with Comp they were able to locate(although crane being done they had only a couple left) and I let them grind that cam. If I had ordered the same pn with that magical-9 through Jegs,Summit,etc I would recieve a CAST core as most running a hyd roller would be fine with that choice. For those that guessed the right was a -9 you were wrong,thats a crane billet(comp billets are -9),for those that guessed the cam on the left,you win!! Comp hyd roller cast core -9.Would you want a billet hyd roller cam and the pain of using a bronze gear on a mild build? I think several of you just missed my point completely.