Well I am going with a comp extreme energy roller cam in my 350 build and from what I heard they are really good cams and do good on power etc. I have one of the thumpr roller cams in one of my other builds and it does not make a bunch of valvetrain noise. I can't say but if you have good parts to match up with it such as rocker arms and springs etc it should not make that much noise but then again the xtreme energy line and other cams similar such as lunati voodoo cams etc they all will make the valvetrain clang and bang cause with them being performance type cams. I will post my results in a few months. I have not heard too many people complain about them.