Re: horsepower 360/ 390
The RAM intake manifold is a two stage internally, to add power and torque. Not sure why it was not used in the WK2's and the 300/Charger.
2013 Limited Hemi 4x4 - Vision wheels with 285/60/18 Terra Grapplers.
2011 Overland Hemi 4x4 black/black - retired with QL problems at 46000 miles