YES!! Especially now since cam parts seem to be made of Chinesium and fail easily! I've been a fan of Comp Cams for decades, and am using one in my Jeep stroker build, but you have to treat them as fragile. There is a high probability of cam failure if you put full high RPM springs in for break in. In fact, you may even want to toss a set of worn-out stockers in for break-in to reduce the chance of cam/lifter failure even more. Once broken in, swap in the good stuff.