Nobody here tells it like it is --those XE series make a lot of noise and clatter as they all have some crazy closing ramp that makes the computer that designed them happy but they stink as street cams--WHY put up with that clatter? Oh..they say it makes more HP--yea right! One of the older Magnum cams is JUST AS GOOD in a streeter and they do make good HP for their size--I dyno Mopars all the time --have done a zillion and those cams are not all that great---call Bullit or Cam Motion or Isky or Engle and get a great cam on a GOOD core ( lot of Comps junk is China softies) or just drop a Magnum Comp in and have a great rod--XE's are hype and clattering crap as far as I am concerned