Well, I just can't go along with the, kick Comp Cams, group here. I have used their cams and lifters for years with no problems.Keep a eye on your valve lash and spring pressure and you are not going to have a problem. I had them grind my last custom grind cam and it checked out perfect. Give them the lobe profile you want with the LSA and base circle and no problem. You need to make sure things are right when you are putting it together just not bolt it in and go. Check for spring bind, retainer to guide clearance, installed height, get the right length push rod, check for binding. Degree the cam in with accurate equipment, and double check everything.