Well it's all speculation that the current HEMI will get an update. I have read the original saying major changes "seem to" have been abandoned. I would be pretty surprised however they let their best seller not catch at least 10-15 more HP/torque. Motor trend predicted a while back about 425 HP. That seems a bit too high. But remember 2008 (345) 2009 (390). In terms of the 6.4, that will get an 8 speed most likely. If they put an 8 speed in the heavy duty then why not in the half ton? EPA? maybe. TBH I kinda rambled about the mid design something I haven't really read on. I unfortunately can't find what I'm looking for. But, RAM will have performance vehicles in the future, that I found. 2019? I have no idea.