Noise valve lifters perhaps. If the problem persists, you should be taking this back to the dealership - this might fall under warranty repairs.
The 5.7 Liter Hemi had 345 Horsepower in 2007 & 2008 - went up to 390 horsepower in 2009
how to install a ac housing on a 2007 dodge ram 1500 , mega cab hemi
5w205w20
Very likely, as there was no 2007 Dodge Challenger.
7 quarts 5w20
Regular unleaded
charger has more horsepower.
5w20
7 quarts
inside transmission
The hemi has sixteen spark plugs.
340-350