Ok I'm a bit confused by this action/movement. So is it treated as regular action. So to slam and drop a action header bomb you would need push the limit correct

Well Push the Limit only works with Action Bar actions, not Upgrade (or Damage) card actions, but yes, SLAM is a regular action in most respects (it can't ever be executed as a free action, is one important caveat).

Advanced SLAM is the upgrade you're looking for.